According to CovidNow, most Sinovac doses were administered between June and August last year, indicating that most adults fully vaccinated with Sinovac should be eligible for their third shot. “The efficacy of Sinovac against new variants, especially Omicron, might be lower and therefore, opting for a higher efficacy booster shot is good. Dr Muhammad explained that the Sinovac vaccine is based on whole inactivated virions. “Booster doses in Sarawak have proven their effectiveness in preventing possible new clusters after the recent state election. “I urge those who have received Sinovac vaccines not to hesitate in taking Pfizer or AZ as their booster shots,” Dr Zainal said.

Source: The Star January 16, 2022 04:55 UTC