A year after infection with the coronavirus, when antibodies in the blood are barely detectable, the immune system continues to “remember” the virus and should respond to some extent upon re-encountering it, a study from China suggests. Researchers studied 141 people infected with the virus in the first half of […]
A new wave of COVID-19 cases caused by the highly transmissible delta variant is exacerbating the worldwide public health crisis, and has led to consideration of the potential need for, and optimal timing of, booster doses for vaccinated populations. Although the idea of further reducing the number of COVID-19 cases […]
French study adds evidence about vaccine efficacy in challenging population A recent outbreak of COVID-19 at a French nursing home shows that even fully vaccinated residents remain vulnerable to illness, according to researchers. Among 74 residents, 23% contracted SARS-CoV-2, including 14 of the 70 who were fully vaccinated, two partially […]
Abstract Currently approved viral vector-based and mRNA-based vaccine approaches against coronavirus disease 2019 (COVID-19) consider only homologous prime-boost vaccination. After reports of thromboembolic events, several European governments recommended using AstraZeneca’s ChAdOx1-nCov-19 (ChAd) only in individuals older than 60 years, leaving millions of already ChAd-primed individuals with the decision to receive […]
Coronavirus spikes protrude to infect cells (adapted from an illustration by the University of Texas at Austin) When the immune system detects an invading virus like COVID-19, it sends swarms of antibodies to latch on to it, blocking its ability to attach to cells and marking it for destruction by […]
CHAPEL HILL, NC, USA, (April 20, 2021) – As a complement to its recent statement on blood clots associated with COVID-19 vaccination, the International Society on Thrombosis and Haemostasis (ISTH) has issued interim guidance for the diagnosis and treatment of vaccine-induced immune thrombotic thrombocytopenia (VITT). This guidance, which builds upon the work […]
People previously infected with SARS-CoV-2 showed higher antibody and T-cell responses after one dose of Pfizer’s BNT162b2 messenger (mRNA) vaccine compared with people who had a first dose without previously contracting the virus, according to research led by the universities of Sheffield and Oxford. The early findings from the Protective […]
Créditos: Comité científico Covid
