haxxiy on 07 March 2021
Severe Covid-19 cases over the age of 85 - 90 have dropped 50 - 70% since the beginning of vaccination in late January, according to multiple preliminary reports, here in Brazil. This would suggest a single dose of the Oxford/AZ or the Sinovac vaccines are proving to be effective in the most immunologically vulnerable age group, even in the face of the P1 variant, which is dominant in most states now.
These are absolute numbers of the entire age group (vaccinated or not), by the way; considering the prevalence of the disease has increased up to 40% among other age groups, the proportional reduction is more like 70 - 80%.
