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On prevention of corona, Pfizer said, Kovid-19 vaccine may have to be applied every year

Corona infection is increasing with uncontrollable speed in countries around the world including India. However, to prevent its spread, waxing has been started on a large scale in almost all countries. Meanwhile, Albert Bourla, CEO of American drug maker Pfizer, said that Pfizer-BioNtech’s Kovid-19 vaccine may be needed for the third time within a year […]