We are lucky we have vaccines at all; it was never a sure thing. Also, IIRC Sinovac’s Coronavirus vaccine is an “old style” inactivated virus vaccine, and the

We are lucky we have vaccines at all; it was never a sure thing. Also, IIRC Sinovac’s Coronavirus vaccine is an “old style” inactivated virus vaccine, and the J&J one is an adenovirus vector vaccine. They are not as effective as the mRNA vaccines.