Chulalongkorn University in Bangkok has confirmed both Synovac and AstraZeneca covid-19 vaccines. Virologist, Yong Poovorwan, says both vaccines proved successful against covid-19.
Yong said studies are being carried out into long term Covid-19 immunity and does not rule out a need for booster doses to keep immunity at maximum levels.
“As Covid-19 has a short incubation period, it may be necessary to administer more doses to ensure people’s immunity is at the highest level.”aZeneca showed over 98% immunity to Covid-19, while those who had received 2 doses of the Sinovac vaccine showed immunity of over 99%. People who had already been infected with Covid-19 showed immunity of over 92%, but Yong warns that this does not rule out re-infection.