Brazil: previously infected and fully vaccinated subjects with high anti-S IgG titers are susceptible to infection by VOC

Here we show that even previously infected and fully vaccinated subjects with high anti-S IgG titers are susceptible to infection by VOC, highlighting that immune responses induced by either natural infection or vaccination may not be sufficient to prevent infection by SARS-CoV-2 variants.  More...

India: 1.6% coronavirus vaccine breakthrough rate in study of healthcare workers

India’s largest yet data analysis of the so-called breakthrough infections after inoculation with Covishield [AstraZeneca] has found that 16 in every 1,000 fully vaccinated healthcare workers developed Covid-19 infections, about threefold the incidence observed in a US study after Pfizer or Moderna doses.  More...