Leaked memo raises Thai concern about Sinovac vaccine efficacy July 05, 2021 at 12:13AM

A leaked health ministry document has prompted calls in Thailand for medical staff inoculated against Covid-19 to be given a booster of an mRNA vaccine, after it included a comment that such a move could dent public confidence in Sinovac Biotech's vaccine. The internal memo, which included various opinions, was reported by local media and shared widely on social media.