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...

Singapore: significant risk of vaccine breakthrough with the Sinovac coronavirus vaccine

There is a significant risk of “vaccine breakthrough” with the Sinovac vaccine, or CoronaVac, with international evidence showing that many who had taken it were later infected with COVID-19, said the Ministry of Health’s (MOH) director of medical services Kenneth Mak on Friday, 18 June 2021.  More...