We conducted an epidemiological investigation of two clusters caused by asymptomatic infections sequenced the spike gene of viruses isolated from 12 patients. All cases of the two clusters we investigated had clear contact histories, both from Wuhan, Hubei province. The viruses isolated from two outbreaks in Anhui were found to show a genetically close link to the virus from Wuhan. In addition, new single nucleotide variations were discovered in the spike gene.

We created an online tool using actual SARS-CoV-2 virus copy number (VCN) data—the COVID19 Pool Tool—to help policy makers understand how pooled testing compares with single-sample testing in different populations. Pooled testing can extend SARS-CoV-2 test supplies and increase the number of patients tested and cases detected, making it useful for population screening and resource-constrained settings.

Analysis of 772 complete genomes from the Boston area epidemic revealed numerous introductions of the virus, a small number of which led to most cases. The data revealed two superspreading events. One, in a skilled nursing facility, led to rapid transmission and significant mortality in this vulnerable population but little broader spread. The second, at an international business conference, produced sustained community transmission and resulted in extensive spread.

This is a genome-wide association study(GWAS) in 2244 critically ill Covid-19 patients from 208 UK intensive care units. We identify novel genome-wide significant associations, on chr12q24.13 in a gene cluster encoding antiviral restriction enzyme activators (OAS1, OAS2, OAS3), on chr19p13.2 near the gene encoding tyrosine kinase 2 (TYK2), on chr19p13.3 within the gene encoding dipeptidyl peptidase 9 (DPP9), and on chr21q22.1 in the interferon receptor gene IFNAR2.

We examined antibody responses in 113 COVID-19 patients and found that severe cases exhibited increased inflammatory markers, lymphopenia, pro-inflammatory cytokines, and high anti-RBD antibody levels. While anti-RBD IgG levels generally correlated with neutralization titer, high potency was a predictor of survival. In addition to neutralization of wild-type SARS-CoV-2, patient sera were also able to neutralize the recently emerged SARS-CoV-2 mutant D614G.

It is currently unclear whether SARS-CoV-2 reinfection will remain a rare event, or whether it will occur more frequently when humoral immunity wanes following primary infection. We report reinfection was confirmed in a young, immunocompetent health care worker as viral genomes derived from the first and second episode belonged to different clades. The reinfection occurred after 185 days, despite an effective humoral immune response following symptomatic primary infection.

An outbreak of coronavirus disease 2019 occurred on the U.S.S. Theodore Roosevelt, a nuclear-powered aircraft carrier with a crew of 4779 personnel.We obtained clinical and demographic data for all crew members, including results of testing by real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). All crew members were followed up for a minimum of 10 weeks, regardless of test results or the absence of symptoms.

We conducted an epidemiological investigation of two clusters caused by asymptomatic infections sequenced the spike gene of viruses isolated from 12 patients. All cases of the two clusters we investigated had clear contact histories, both from Wuhan, Hubei province. The viruses isolated from two outbreaks in Anhui were found to show a genetically close link to the virus from Wuhan. In addition, new single nucleotide variations were discovered in the spike gene.

We created an online tool using actual SARS-CoV-2 virus copy number (VCN) data—the COVID19 Pool Tool—to help policy makers understand how pooled testing compares with single-sample testing in different populations. Pooled testing can extend SARS-CoV-2 test supplies and increase the number of patients tested and cases detected, making it useful for population screening and resource-constrained settings.

Analysis of 772 complete genomes from the Boston area epidemic revealed numerous introductions of the virus, a small number of which led to most cases. The data revealed two superspreading events. One, in a skilled nursing facility, led to rapid transmission and significant mortality in this vulnerable population but little broader spread. The second, at an international business conference, produced sustained community transmission and resulted in extensive spread.

This is a genome-wide association study(GWAS) in 2244 critically ill Covid-19 patients from 208 UK intensive care units. We identify novel genome-wide significant associations, on chr12q24.13 in a gene cluster encoding antiviral restriction enzyme activators (OAS1, OAS2, OAS3), on chr19p13.2 near the gene encoding tyrosine kinase 2 (TYK2), on chr19p13.3 within the gene encoding dipeptidyl peptidase 9 (DPP9), and on chr21q22.1 in the interferon receptor gene IFNAR2.

We examined antibody responses in 113 COVID-19 patients and found that severe cases exhibited increased inflammatory markers, lymphopenia, pro-inflammatory cytokines, and high anti-RBD antibody levels. While anti-RBD IgG levels generally correlated with neutralization titer, high potency was a predictor of survival. In addition to neutralization of wild-type SARS-CoV-2, patient sera were also able to neutralize the recently emerged SARS-CoV-2 mutant D614G.

It is currently unclear whether SARS-CoV-2 reinfection will remain a rare event, or whether it will occur more frequently when humoral immunity wanes following primary infection. We report reinfection was confirmed in a young, immunocompetent health care worker as viral genomes derived from the first and second episode belonged to different clades. The reinfection occurred after 185 days, despite an effective humoral immune response following symptomatic primary infection.

An outbreak of coronavirus disease 2019 occurred on the U.S.S. Theodore Roosevelt, a nuclear-powered aircraft carrier with a crew of 4779 personnel.We obtained clinical and demographic data for all crew members, including results of testing by real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). All crew members were followed up for a minimum of 10 weeks, regardless of test results or the absence of symptoms.

We conducted an epidemiological investigation of two clusters caused by asymptomatic infections sequenced the spike gene of viruses isolated from 12 patients. All cases of the two clusters we investigated had clear contact histories, both from Wuhan, Hubei province. The viruses isolated from two outbreaks in Anhui were found to show a genetically close link to the virus from Wuhan. In addition, new single nucleotide variations were discovered in the spike gene.

We created an online tool using actual SARS-CoV-2 virus copy number (VCN) data—the COVID19 Pool Tool—to help policy makers understand how pooled testing compares with single-sample testing in different populations. Pooled testing can extend SARS-CoV-2 test supplies and increase the number of patients tested and cases detected, making it useful for population screening and resource-constrained settings.

Analysis of 772 complete genomes from the Boston area epidemic revealed numerous introductions of the virus, a small number of which led to most cases. The data revealed two superspreading events. One, in a skilled nursing facility, led to rapid transmission and significant mortality in this vulnerable population but little broader spread. The second, at an international business conference, produced sustained community transmission and resulted in extensive spread.

This is a genome-wide association study(GWAS) in 2244 critically ill Covid-19 patients from 208 UK intensive care units. We identify novel genome-wide significant associations, on chr12q24.13 in a gene cluster encoding antiviral restriction enzyme activators (OAS1, OAS2, OAS3), on chr19p13.2 near the gene encoding tyrosine kinase 2 (TYK2), on chr19p13.3 within the gene encoding dipeptidyl peptidase 9 (DPP9), and on chr21q22.1 in the interferon receptor gene IFNAR2.

We examined antibody responses in 113 COVID-19 patients and found that severe cases exhibited increased inflammatory markers, lymphopenia, pro-inflammatory cytokines, and high anti-RBD antibody levels. While anti-RBD IgG levels generally correlated with neutralization titer, high potency was a predictor of survival. In addition to neutralization of wild-type SARS-CoV-2, patient sera were also able to neutralize the recently emerged SARS-CoV-2 mutant D614G.

It is currently unclear whether SARS-CoV-2 reinfection will remain a rare event, or whether it will occur more frequently when humoral immunity wanes following primary infection. We report reinfection was confirmed in a young, immunocompetent health care worker as viral genomes derived from the first and second episode belonged to different clades. The reinfection occurred after 185 days, despite an effective humoral immune response following symptomatic primary infection.

An outbreak of coronavirus disease 2019 occurred on the U.S.S. Theodore Roosevelt, a nuclear-powered aircraft carrier with a crew of 4779 personnel.We obtained clinical and demographic data for all crew members, including results of testing by real-time reverse-transcriptase polymerase chain reaction (rRT-PCR). All crew members were followed up for a minimum of 10 weeks, regardless of test results or the absence of symptoms.