Existing vaccines effective for at least one year: Virologist

Existing vaccines effective for at least one year: Virologist The existing Covid-19 vaccines are effective for a minimum one year as per available evidence and if more troubling variants don’t emerge, the protection may last for a couple of years, virologist Dr V Ravi, who is a member of Karnataka’s Covid task force committee, said. https://ift.tt/eA8V8J