In this study, 37% of 146,000 PCR-tested contacts of infected persons in England were positive for SARS-CoV-2. Transmission of the alpha variant from twice-vaccinated index patients was rarer than that from unvaccinated index patients (adjusted rate ratio with BNT162b2, 0.32). Vaccine protection waned over time and was more effective against […]
Those who develop COVID-19 despite being fully vaccinated are considerably less infectious for contact persons, who in turn are protected from infection if vaccinated. It has become evident that some individuals may develop COVID-19 despite full vaccination, especially if they are older or immunocompromised and if longer intervals have elapsed […]
Dr Maria Van Kerkhove explains factors that are driving COVID-19 transmission: the Delta variant vaccine inequity social mixing inconsistent use of public health & social measures misinformation https://www.facebook.com/watch/?v=2457626427715211&extid=WA-UNK-UNK-UNK-AN_GK0T-GK1C&ref=sharing Créditos: Comité científico Covid
