Last data update: Dec 02, 2024. (Total: 48272 publications since 2009)
Records 1-15 (of 15 Records) |
Query Trace: Rodes R[original query] |
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The long-term impact of the Tips From Former Smokers® Campaign on calls to 1-800-QUIT-NOW, 2012-2023
Mann NH , Murphy-Hoefer RL , Davis KC , Von Jaglinsky AS , Rodes RM , Beistle DM . Nicotine Tob Res 2024 INTRODUCTION: There is substantial evidence that mass media campaigns increase calls to quitlines and smoking cessation. In 2012, the Centers for Disease Control and Prevention launched the first federally funded national tobacco education campaign, Tips From Former Smokers® (i.e. Tips), which has since aired television advertisements annually. To date, no studies have examined the long-term effect of a national smoking cessation campaign on quitline calls. This study examined the long-term impact of Tips television ads on calls to 1-800-QUIT-NOW from 2012 through 2023. METHODS: Exposure to the Tips campaign was measured using weekly television gross rating points (GRPs) in each U.S. designated market area. We obtained data on calls to 1-800-QUIT-NOW from the National Cancer Institute and used linear regression to model calls to 1-800-QUIT-NOW, from 2012 through 2023, as a function of weekly media market-level GRPs for Tips television ads. Using the regression model results, we calculated predicted values of calls to 1-800-QUIT-NOW across observed GRP values to determine the total additional calls to 1-800-QUIT-NOW that were attributable to the Tips campaign during 2012-2023. RESULTS: Tips GRPs were positively and significantly associated with calls to 1-800-QUIT-NOW across all years (b = 39.94, p < 0.001). Based on this association, we estimate the Tips campaign generated nearly 2.1 million additional calls to 1-800-QUIT-NOW during 2012-2023. CONCLUSIONS: Exposure to the Tips campaign has consistently and significantly increased calls to tobacco quitlines. IMPLICATIONS: Quitlines provide evidence-based support to help people quit smoking. They have been shown to increase the likelihood of successfully quitting. Mass media campaigns have promoted quitline services, and quitline calls have increased significantly with media promotion. The long-term effect of campaigns - like the Centers for Disease Control and Prevention's Tips From Former Smokers® (i.e. Tips) - on quitline calls has not been determined. From 2012 through 2023, exposure to the Tips campaign is estimated to have generated nearly 2.1 million additional calls to 1-800-QUIT-NOW. This study supports continued use of mass media to promote quitlines. |
The impact of the Tips From Former Smokers campaign on reducing cigarette smoking relapse
Davis Kevin , Murphy-Hoefer Rebecca , Dutra Lauren , King Brian , Bradfield Brian , Rodes Robert , Beistle Diane . J Smok Cessat 2022 2022 1-8 Evidence-based mass-reach health communication campaigns can increase tobacco cessation, use of cessation resources such as quitlines, and change tobacco-related social norms. These interventions have been associated with a lower likelihood of cigarette smoking relapse in studies conducted internationally; however, no studies have assessed this outcome for a national campaign in the United States. This study examined the relationship between Tips from Former Smokers® (Tips®) campaign exposure and the odds of cigarette smoking relapse among adults who formerly smoked. Using data from the 2014 to 2019 Tips longitudinal campaign surveys, we estimated first episode of relapse (versus remaining a former smoker) as a function of Tips gross rating points (GRPs, a measure of media exposure). Higher levels of Tips GRPs were associated with lower odds of relapse (aOR = 0.63 , 95% CI: 0.50-0.78). These results suggest that the Tips campaign may reduce smoking relapse, in addition to the established effect of increasing smoking cessation. Former smokers can be considered a secondary target audience for smoking cessation mass media campaigns, and mass media campaigns could be considered a component of smoking relapse prevention efforts. |
Differences in quitline registrants' characteristics during national radio versus television antismoking campaigns
Zhang L , Rodes R , Mann N , Thompson J , McAfee T , Murphy R , Frank R , Davis K , Babb S . Am J Prev Med 2021 60 S107-S112 Introduction: The Centers for Disease Control and Prevention's Tips From Former Smokers campaign encourages smokers to get help with quitting smoking by promoting 1-800-QUIT-NOW. Campaign advertisements featuring an offer of help with obtaining free cessation medication aired nationally on radio for 2 weeks in 2016. Similar advertisements aired nationally on TV for 3 weeks in 2017. The comparison period of 2016 radio campaign and 2017 TV campaign was used to examine the characteristics of quitline registrants by a media referral source (TV or radio). Method(s): Data on the number and demographics of quitline registrants in 2016 and 2017 were obtained from the Centers for Disease Control and Prevention's National Quitline Data Warehouse. The investigators conducted t-tests to assess the demographic differences between registrants who heard about the quitline through the radio advertisements and those who heard about it through the TV advertisements during the comparison period. This analysis was conducted in 2019. Result(s): The registrants who heard about the quitline from radio advertisements were more likely to be male, younger, and have more years of education. However, the registrants who heard about the quitline from TV advertisements were more likely to be Black, non-Hispanic, and have fewer years of education. Conclusion(s): The findings suggest that the demographic profiles of quitline registrants vary significantly based on how registrants hear about the quitline (via radio or TV). These differences in the characteristics of registrants can help inform the tobacco control mass media purchasing strategies and may enable media efforts to target the specific subgroups of smokers in a better way. |
Association between the Tips From Former Smokers Campaign and smoking cessation among adults, United States, 2012-2018
Murphy-Hoefer R , Davis KC , King BA , Beistle D , Rodes R , Graffunder C . Prev Chronic Dis 2020 17 E97 In 2012, the Centers for Disease Control and Prevention (CDC) launched the national Tips From Former Smokers (Tips) campaign to encourage people who smoke to quit by showing real-life heath consequences of tobacco use and promoting evidence-based resources for quitting. To assess the campaign's impact on quit attempts and sustained-quit estimates (ie, quits lasting ≥6 mos), CDC analyzed data from a nationally representative longitudinal survey of US adults who smoke cigarettes, aged 18 years or older in 2012-2018. The Tips campaign was associated with an estimated 16.4 million quit attempts and 1,005,419 sustained quits. Continued implementation of cessation campaigns, including the Tips campaign, could accelerate progress toward reducing rates of smoking-related diseases and death. |
Budgetary impact from multiple perspectives of sustained antitobacco national media campaigns to reduce the harms of cigarette smoking
Maciosek MV , Armour BS , Babb SD , Dhemer SP , Grossman ES , Homa DM , LaFrance AB , Rodes R , Wang X , Xu Z , Yang Z , Roy K . Tob Control 2020 BACKGROUND: High-intensity antitobacco media campaigns are a proven strategy to reduce the harms of cigarette smoking. While buy-in from multiple stakeholders is needed to launch meaningful health policy, the budgetary impact of sustained media campaigns from multiple payer perspectives is unknown. METHODS: We estimated the budgetary impact and time to breakeven from societal, all-payer, Medicare, Medicaid and private insurer perspectives of national antitobacco media campaigns in the USA. Campaigns of 1, 5 and 10 years of durations were assessed in a microsimulation model to estimate the 10 and 20-year health and budgetary impact. Simulation model inputs were obtained from literature and both pubic use and proprietary data sets. RESULTS: The microsimulation predicts that a 10-year national smoking cessation campaign would produce net savings of $10.4, $5.1, $1.4, $3.6 and $0.2 billion from the societal, all-payer, Medicare, Medicaid and private insurer perspectives, respectively. National antitobacco media campaigns of 1, 5 and 10-year durations could produce net savings for Medicaid and Medicare within 2 years, and for private insurers within 6-9 years. A 10-year campaign would reduce adult cigarette smoking prevalence by 1.2 percentage points, prevent 23 500 smoking-attributable deaths over the first 10 years. In sensitivity analysis, media campaign costs would be offset by reductions in medical care spending of smoking among all payers combined within 6 years in all tested scenarios. CONCLUSIONS: 1, 5 and 10-year antitobacco media campaigns all yield net savings within 10 years from all perspectives. Multiyear campaigns yield substantially higher savings than a 1-year campaign. |
Evidence of the Impact of the Tips From Former Smokers Campaign: Results From the Behavioral Risk Factor Surveillance System
Davis KC , Murphy-Hoefer R , Levine B , King BA , Hu S , Rodes R . Prev Chronic Dis 2019 16 E137 The Tips From Former Smokers campaign (Tips) has demonstrated significant impact as a population-based intervention for smoking cessation in the United States. Since 2012, evaluations of Tips have relied on web-panel data to attribute the campaign to smoking cessation outcomes. We re-examined the relationship between market-level doses of the campaign and quit attempts by using Behavioral Risk Factor Surveillance System (BRFSS) data to triangulate prior findings. We found that Tips was associated with increased quit attempts among smokers, which validates prior evaluation research on the impact of Tips. These results suggest that continued investments in Tips may help sustain its impact on cessation-related outcomes. |
The 2016 Tips From Former Smokers(R) Campaign: Associations with quit intentions and quit attempts among smokers with and without mental health conditions
Prochaska JJ , Gates EF , Davis KC , Gutierrez K , Prutzman Y , Rodes R . Nicotine Tob Res 2018 21 (5) 576-583 Introduction: People living with mental health conditions (MH+) are more likely to smoke cigarettes than people without mental health conditions (MH-) and to experience tobacco-related disparities. The Tips From Former Smokers(R) (Tips(R)) campaign is a proven population-level strategy for motivating smokers to quit. In 2016, Tips included ads featuring Rebecca, a former smoker with depression. We evaluated self-reported frequency of exposure to the Rebecca and other Tips ads in association with quit intentions and quit attempts among MH+ and MH- smokers. Methods: Intentions to quit and past 6-month quit attempts lasting at least 24 hours were reported from a two-wave longitudinal online survey conducted before and after the 2016 Tips campaign with a nationally representative sample of US adult cigarette smokers with (MH+, N = 777) and without (MH-, N = 1806) lifetime mental health conditions. Results: In 2016, among MH+ respondents, greater exposure to the Rebecca ads was significantly associated with increased odds of intending to quit in the next 30 days (adjusted odds ratio [AOR] = 1.40, p < .05) and with reporting a quit attempt in the past 6 months (AOR = 1.25, p < .05). Among MH- respondents, greater exposure to the other Tips ads was associated with increased odds of making a quit attempt (AOR = 1.19, p < .05). Conclusions: Exposure to the Rebecca ads was associated with a greater likelihood of intentions to quit and quit attempts among MH+ smokers; whereas, exposure to the other (non-mental-health-related) Tips ads was associated with a greater likelihood of quit attempts among MH- smokers. Implications: National media campaigns are an important population-level strategy for reaching specific population groups who are experiencing tobacco-related disparities. The findings support the inclusion of ads featuring people living with mental health conditions in national tobacco education media campaigns, such as Tips. |
Impact of U.S. antismoking tv ads on Spanish-language quitline calls
Zhang L , Babb S , Johns M , Mann N , Thompson J , Shaikh A , Lavinghouze R , Rodes R , Malarcher A . Am J Prev Med 2018 55 (4) 480-487 INTRODUCTION: Cigarette smoking is a major preventable cause of disease and death among U.S. Hispanics. Tobacco-cessation quitlines have been shown to increase quitting among Hispanics. However, the use of quitlines by this population remains low, especially among Spanish-speaking Hispanics. This study evaluates the promotion of 1-855-DEJELO-YA (a quitline portal that routes callers to state-specific Spanish-language services) implemented as part of the Centers for Disease Control and Prevention's national Tips From Former Smokers((R)) (Tips((R))) campaign. Additionally, this study examines how media content impacted calls to 1-855-DEJELO-YA. METHODS: Using National Cancer Institute data on calls to 1-855-DEJELO-YA from February 2013 to December 2014, multivariate linear regressions were conducted of weekly area code-level call volume as a function of media market-level Gross Rating Points for Tips Spanish-language TV ads tagged with 1-855-DEJELO-YA. The models were adjusted for covariates, including market-level population characteristics and state fixed effects. The data were analyzed from October 2017 through April 2018. RESULTS: Greater exposure to Tips Spanish-language ads was associated with increased calls to 1-855-DEJELO-YA (p<0.001). On average, each additional 100 Tips Gross Rating Points per media market increased calls by 0.56 (95% CI=0.45, 0.67) calls/week/area code, representing congruent with 974 additional calls beyond the baseline. Media messages highlighting health consequences of smoking had a greater effect size than messages highlighting health effects of secondhand smoke. CONCLUSIONS: A national Spanish-language quitline number could be a useful cessation resource for Spanish-speaking cigarette smokers. Opportunities exist to increase use of this number through a national Spanish-language media campaign, particularly by focusing campaign messages on the health consequences of smoking. |
Impact of the Tips From Former Smokers Campaign on population-level smoking cessation, 2012-2015
Murphy-Hoefer R , Davis KC , Beistle D , King BA , Duke J , Rodes R , Graffunder C . Prev Chronic Dis 2018 15 E71 This study provides estimates of the long-term cumulative impact of the Centers for Disease Control and Prevention's national tobacco education campaign, Tips From Former Smokers (Tips), on population-level smoking cessation. We used recently published estimates of the association between increased Tips campaign media doses and quit attempts to calculate campaign-attributable population sustained (6-month) quits during 2012-2015. Tips led to approximately 522,000 sustained quits during 2012-2015. These findings indicate that the Tips campaign's comprehensive approach to combining evidence-based messages with the promotion of cessation resources was successful in achieving substantial long-term cigarette cessation at the population level over multiple years. |
Does digital video advertising increase population-level reach of multimedia campaigns? Evidence from the 2013 Tips from Former Smokers Campaign
Davis KC , Shafer PR , Rodes R , Kim A , Hansen H , Patel D , Coln C , Beistle D . J Med Internet Res 2016 18 (9) e235 BACKGROUND: Federal and state public health agencies in the United States are increasingly using digital advertising and social media to promote messages from broader multimedia campaigns. However, little evidence exists on population-level campaign awareness and relative cost efficiencies of digital advertising in the context of a comprehensive public health education campaign. OBJECTIVE: Our objective was to compare the impact of increased doses of digital video and television advertising from the 2013 Tips From Former Smokers (Tips) campaign on overall campaign awareness at the population level. We also compared the relative cost efficiencies across these media platforms. METHODS: We used data from a large national online survey of approximately 15,000 US smokers conducted in 2013 immediately after the conclusion of the 2013 Tips campaign. These data were used to compare the effects of variation in media dose of digital video and television advertising on population-level awareness of the Tips campaign. We implemented higher doses of digital video among selected media markets and randomly selected other markets to receive similar higher doses of television ads. Multivariate logistic regressions estimated the odds of overall campaign awareness via digital or television format as a function of higher-dose media in each market area. All statistical tests used the .05 threshold for statistical significance and the .10 level for marginal nonsignificance. We used adjusted advertising costs for the additional doses of digital and television advertising to compare the cost efficiencies of digital and television advertising on the basis of costs per percentage point of population awareness generated. RESULTS: Higher-dose digital video advertising was associated with 94% increased odds of awareness of any ad online relative to standard-dose markets (P<.001). Higher-dose digital advertising was associated with a marginally nonsignificant increase (46%) in overall campaign awareness regardless of media format (P=.09). Higher-dose television advertising was associated with 81% increased odds of overall ad awareness regardless of media format (P<.001). Increased doses of television advertising were also associated with significantly higher odds of awareness of any ad on television (P<.001) and online (P=.04). The adjusted cost of each additional percentage point of population-level reach generated by higher doses of advertising was approximately US $440,000 for digital advertising and US $1 million for television advertising. CONCLUSIONS: Television advertising generated relatively higher levels of overall campaign awareness. However, digital video was relatively more cost efficient for generating awareness. These results suggest that digital video may be used as a cost-efficient complement to traditional advertising modes (eg, television), but digital video should not replace television given the relatively smaller audience size of digital video viewers. |
The influence of state-specific quitline numbers on call volume during a national tobacco education campaign promoting 1-800-QUIT-NOW
Zhang L , Malarcher A , Mann N , Campbell K , Davis K , Anderson C , Alexander R , Rodes R . Nicotine Tob Res 2016 18 (8) 1780-5 INTRODUCTION: Previous research has shown that the first federally funded national tobacco education campaign (Tips) increased calls to the national quitline portal (1-800-QUIT-NOW). Quitlines in 13 states have alternate state-specific telephone numbers. This study examined quitline calls to 1-800-QUIT-NOW in states with and without alternate numbers during the Tips campaign. METHODS: We used data on calls to 1-800-QUIT-NOW from all US states and the District of Columbia from 2 weeks before to 2 weeks after the 2012 Tips campaign. Similar data were obtained for California's alternate number, 1-800-NO-BUTTS. Multivariate linear models examined whether an interaction existed between Tips exposure, as measured by gross rating points, and presence of an alternate quitline number as well as the effect of Tips on calls to California's 1-800-NO-BUTTS. RESULTS: Having an alternate quitline number did not affect the rate of increase in calls to 1-800-QUIT-NOW, but it was associated with lower absolute numbers of calls to 1-800-QUIT-NOW. On average, states with alternate numbers had 98 fewer calls to 1-800-QUIT-NOW per week in a given area code than those without an alternate number (P < .001). In California, Tips gross rating points were positively correlated with calls to 1-800-QUIT-NOW (b = 38.5, P < .001) and to 1-800-NO-BUTTS (b = 14.1, P < .05). CONCLUSIONS: The Tips campaign had the same effect in increasing calls to 1-800-QUIT-NOW in states with and without alternate quitline numbers and had a modest spillover effect on calls to California's alternate number. States may consider the advantages and disadvantages of having alternate quitline numbers given continued national promotions of 1-800-QUIT-NOW. IMPLICATIONS: This is the first study that assesses whether the impact of a national tobacco education campaign promoting the national quitline portal number was influenced by the presence of state-specific quitline numbers and whether there was any spillover effect on calls to states' alternate quitline numbers. This study provides important information for states to consider the advantages and disadvantages of maintaining state-specific quitline numbers. |
Perceived effectiveness of antismoking ads and association with quit attempts among smokers: evidence from the Tips From Former Smokers Campaign
Davis KC , Duke J , Shafer P , Patel D , Rodes R , Beistle D . Health Commun 2016 32 (8) 1-8 BACKGROUND: Measures of perceived effectiveness (PE) of ads have been validated to predict changes in cognitive precursors of quit attempts, but a relationship between PE and actual quit attempts has not been shown in population-based studies. We analyzed smokers' PE ratings of ads from the national Tips From Former Smokers (Tips) campaign to (1) establish the validity of PE in predicting quit attempts in a large, nationally representative sample of smokers; (2) identify behavioral and demographic correlates of PE among respondents; and (3) examine whether PE is influenced by matching the race/ethnicity of ad participants with that of the ad viewer. METHODS: We used survey data from two waves (baseline and follow-up) of a longitudinal online cohort of adult U.S. cigarette smokers. Respondents were shown one or more of 14 Tips campaign ads and were asked to assess each ad in terms of PE. We used multivariate models to estimate the association between baseline PE and prospective quit attempts; cross-sectional associations between PE and various respondent characteristics, including race/ethnicity, desire to quit, and health conditions; and the association between race/ethnicity of respondents and Tips ad participants. RESULTS: Higher PE at baseline was associated with increased odds of a quit attempt at follow-up. Higher PE scores were associated with non-Hispanic black race, Hispanic ethnicity, higher desire to quit, presence of a chronic health condition, and presence of a mental health condition. There was no relationship between PE scores and matched race/ethnicity of the respondent and Tips ad participants. CONCLUSIONS: This is the first study to demonstrate an association between PE scores for antismoking ads and prospective quit attempts in a large, nationally representative sample of smokers. Our findings also provide strong evidence that racial/ethnic minority subpopulations, including non-Hispanic blacks and Hispanics, react more favorably to Tips campaign ads irrespective of race/ethnicity of the ad participant. This suggests that message characteristics (e.g., graphic visuals and emotional content) may play a more important role in PE than race/ethnicity of ad participants. |
The impact of a national tobacco education campaign on state-specific quitline calls
Zhang L , Malarcher A , Babb S , Mann N , Davis K , Campbell K , Schauer G , Alexander R , Debrot K , Rodes R . Am J Health Promot 2016 30 (5) 374-81 PURPOSE: The ads from the first federally funded national tobacco education campaign, Tips From Former Smokers (Tips), considerably increased quitline calls nationwide. This study evaluates the effect of Tips on state-specific quitline calls. DESIGN: Precampaign, during-campaign, and postcampaign comparison; regression modeling. SETTING: All fifty states as well as the District of Columbia. SUBJECTS: Calls to state quitlines. INTERVENTION: Tips. MEASURES: Tips campaign exposure was measured by gross rating points (GRPs). Calls to quitline's 1-800-QUIT-NOW were assigned to markets in each state based on their area codes. ANALYSIS: Multivariate regression was used to assess the relationship between calls to state quitlines and media market-level Tips GRPs, while controlling for market and area code characteristics. RESULTS: Nationally, every 100 Tips GRPs per week at the market level was associated with an average of 45 additional quitline calls in each area code (beta = 44.65, p < .001). Tips GRPs were associated with significant increases in quitline calls in 46 states and the District of Columbia, of which 11 experienced effects significantly larger than the national average and 5 experienced significantly smaller effects. We were unable to detect statistically significant effects of GRPs on call volumes for four states. Graphically, call volumes in those states followed Tips GRPs. CONCLUSION: The Tips campaign significantly increased calls to quitlines for almost all the states. These findings underscore the effectiveness of national tobacco media campaigns for reaching state audiences. |
Association between media dose, ad tagging, and changes in web traffic for a national tobacco education campaign: A market-level longitudinal study
Shafer PR , Davis KC , Patel D , Rodes R , Beistle D . J Med Internet Res 2016 18 (2) e39 BACKGROUND: In 2012, the US Centers for Disease Control and Prevention (CDC) launched Tips From Former Smokers (Tips), the first federally funded national tobacco education campaign. In 2013, a follow-up Tips campaign aired on national cable television networks, radio, and other channels, with supporting digital advertising to drive traffic to the Tips campaign website. OBJECTIVE: The objective of this study was to use geographic and temporal variability in 2013 Tips campaign television media doses and ad tagging to evaluate changes in traffic to the campaign website in response to specific doses of campaign media. METHODS: Linear regression models were used to estimate the dose-response relationship between weekly market-level television gross rating points (GRPs) and weekly Web traffic to the Tips campaign website. This relationship was measured using unique visitors, total visits, and page views as outcomes. Ad GRP effects were estimated separately for ads tagged with the Tips campaign website URL and 1-800-QUIT-NOW. RESULTS: In the average media market, an increase of 100 television GRPs per week for ads tagged with the Tips campaign website URL was associated with an increase of 650 unique visitors (P<.001), 769 total visits (P<.001), and 1255 total page views (P<.001) per week. The associations between GRPs for ads tagged with 1-800-QUIT-NOW and each Web traffic measure were also statistically significant (P<.001), but smaller in magnitude. CONCLUSIONS: Based on these findings, we estimate that the 16-week 2013 Tips television campaign generated approximately 660,000 unique visitors, 900,000 total visits, and 1,390,000 page views for the Tips campaign website. These findings can help campaign planners forecast the likely impact of targeted advertising efforts on consumers' use of campaign-specific websites. |
Phylogeographical footprint of colonial history in the global dispersal of human immunodeficiency virus type 2 group A
Faria NR , Hodges-Mameletzis I , Silva JC , Rodes B , Erasmus S , Paolucci S , Ruelle J , Pieniazek D , Taveira N , Trevino A , Goncalves MF , Jallow S , Xu L , Camacho RJ , Soriano V , Goubau P , de Sousa JD , Vandamme AM , Suchard MA , Lemey P . J Gen Virol 2012 93 889-99 Human immunodeficiency virus type 2 (HIV-2) emerged in West Africa and has spread further to countries that share socio-historical ties with this region. However, viral origins and dispersal patterns at a global scale remain poorly understood. Here, we adopt a Bayesian phylogeographic approach to investigate the spatial dynamics of HIV-2 group A (HIV-2A) using a collection of 320 partial pol and 248 partial env sequences sampled throughout 19 countries worldwide. We extend phylogenetic diffusion models that simultaneously draw information from multiple loci to estimate location states throughout distinct phylogenies and explicitly attempt to incorporate human migratory fluxes. Our study highlights that Guinea-Bissau, together with Cote d'Ivoire and Senegal, have acted as the main viral sources in the early stages of the epidemic. We show that convenience sampling can obfuscate the estimation of the spatial root of HIV-2A. We explicitly attempt to circumvent this by incorporating rate priors that reflect the ratio of human flow from and to West Africa. We recover four main routes of HIV-2A dispersal that are laid out along colonial ties: Guinea-Bissau and Cape Verde to Portugal, Cote d'Ivoire and Senegal to France. Within Europe, we find strong support for epidemiological linkage from Portugal to Luxembourg and to the UK. We demonstrate that probabilistic models can uncover global patterns of HIV-2A dispersal providing sampling bias is taken into account and we provide a scenario for the international spread of this virus. |
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