Pfizer's chief executive Dr Albert Bourla told the BBC that he is of the view that annual vaccinations would be needed to maintain a "very high level of protection" against the deadly disease that has claimed over five million lives across the world.
United States Pharma giant Pfizer is in the final stages of an agreement with India to supply anti-COVID-19 vaccines, Chief Executive Officer Dr Albert Bourla said on Tuesday, observing that the domestically manufactured vaccines would be the backbone of vaccinating the Indian people.
Initial data has shown immunity triggered by the two mRNA vaccines -- Pfizer-BioNTech and Moderna -- lasts for at least six months
The vaccine arrives at a critical moment for the US. Hospitalisations due to COVID-19 hit record highs for the seventh day in a row on Saturday.
Pfizer and BioNTech said they have concluded phase 3 study of their mRNA-based COVID-19 vaccine candidate BNT162b2, meeting all primary efficacy endpoints.
The news comes as the United States approaches 300,000 deaths from COVID-19.
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