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Given that vaccine guidance in several countries states that each dose of the multidose COVID-19 vaccine must be produced by the same manufacturer as previous doses, the implication is that in the event of a need for periodic COVID-19 vaccine variants, those who initially received the Oxford-AstraZeneca vaccine would likely be required to receive that same “brand” of…

On December 13th, Pfizer CEO Albert Bourla was quoted by the Telegraph as saying, “How long this [vaccine] protection lasts is something we don’t know … I think it is a likely scenario that you will need periodical vaccinations.” Pfizer also recently issued a statement that noted that “we don’t know how the virus will change, and we also don’t…