THE single dose coronavirus disease (Covid-19) vaccine of Janssen may now be used as booster shot for fully vaccinated adults.This was announced by the Department of Health (DOH), saying Janssen doses can now be used either as homologous or heterologous booster shots.”Fully vaccinated adults may now get Janssen vaccine as a booster dose after the Philippine Food and Drug Administration approved its Emergency Use Authorization,” said the DOH.Under the guidelines on booster combination and intervals, Janssen may be used as homologous (same brand) booster shots after at least two months.On the other hand, Janssen may be used as heterologous (different brand) booster shots after at least three months by those that received AstraZeneca, Moderna, Pfizer, Sinopharm, Sinovac, and Sputnik Light as their primary doses.Previously approved are the use of AstraZeneca, Moderna, Pfizer, Sinopharm, and Sinovac as homologous booster shots.Currently used as heterologous booster shots are AstraZeneca, Moderna, Pfizer, and Sputnik Light.The DOH then encouraged everyone anew to get their booster shots once they are deemed eligible.”DOH assures that all vaccines with Philippine FDA Emergency Use Authorization are proven safe and effective,” it said.As of April 21, 12.7 million individuals have already been boosted, while 37.5 million individuals have yet to receive their booster shots despite being eligible. (SunStar Philippines)