Close

infection

Resurgence of SARS-CoV-2 Infection in a Highly Vaccinated Health System Workforce

TO THE EDITOR: In December 2020, the University of California San Diego Health (UCSDH) workforce experienced a dramatic increase in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections. Vaccination with mRNA vaccines began in mid-December 2020; by March, 76% of the workforce had been fully vaccinated, and by July, the […]

Read More

7 Months After Infection, SARS-CoV-2 Antibody Levels Remain Stable or Even Increase

The levels of IgG antibodies against SARS-CoV-2 Spike protein remain stable, or even increase, seven months after infection, according to a follow-up study in a cohort of healthcare workers coordinated by the Barcelona Institute for Global Health (ISGlobal), an institution supported by “la Caixa” Foundation, in collaboration with the Hospital […]

Read More

English Study Finds 50%-60% Reduced Risk of COVID for Double-Vaccinated

LONDON, Aug 4 (Reuters) – Fully-vaccinated people have an around 50 to 60% reduced risk of infection from the Delta coronavirus variant, including those who are asymptomatic, a large English coronavirus prevalence study found on Wednesday. Imperial College London researchers said people who reported receiving two vaccine doses were half […]

Read More

Diagnostic accuracy of rapid antigen tests in asymptomatic and presymptomatic close contacts of individuals with confirmed SARS-CoV-2 infection: cross sectional study

Abstract Objective To assess the diagnostic test accuracy of two rapid antigen tests in asymptomatic and presymptomatic close contacts of people with SARS-CoV-2 infection on day 5 after exposure. Design Prospective cross sectional study. Setting Four public health service covid-19 test sites in the Netherlands. Participants 4274 consecutively included close contacts (identified through test-and-trace […]

Read More

Clinical Spectrum of SARS-CoV-2 Infection

Patients with SARS-CoV-2 infection can experience a range of clinical manifestations, from no symptoms to critical illness. This section of the Guidelines discusses the clinical presentation of SARS-CoV-2-infected individuals according to illness severity. In general, adults with SARS-CoV-2 infection can be grouped into the following severity of illness categories. However, […]

Read More

Swollen Lymph Nodes After COVID Vaccine May Mean Previous Infection

People who experience particular side effects after receiving a COVID-19 vaccine, such as swollen lymph nodes, may have previously been infected with the coronavirus, according to a new study published on the medRxiv preprint server. The study hasn’t yet been peer-reviewed. Common side effects such as fever, fatigue, muscle pain and joint […]

Read More

Kinetics and correlates of the neutralizing antibody response to SARS-CoV-2 infection in humans

Highlights Broad variation in neutralizing antibodies in SARS-CoV-2-convalescent individuals. ∼3% individuals showed a potent antibody response with SARS-CoV-1 cross-reactivity. Older age, symptomatic and severe disease predict higher SARS-CoV-2 neutralization. Serum and IgG neutralization half-lives were 14.7 and 31.4 weeks respectively. Summary Understanding antibody-based SARS-CoV-2 immunity is critical for overcoming the […]

Read More

Covid-19: One dose of vaccine cuts risk of passing on infection by as much as 50%, research shows

Adults infected with covid-19 three weeks after receiving one dose of the Pfizer-BioNTech or Oxford-AstraZeneca vaccine were 38-49% less likely to pass the virus on to their household contacts than people who were unvaccinated, a preprint released by Public Health England has shown.1 The research looked at the proportion of […]

Read More