Pfizer boosts booster shot, US agencies balk
Pharma giant Pfizer has begun pitching for a booster shot of the coronavirus vaccine saying the efficacy of its two-shot regimen declines after six months. But in an implicit rebuke of the pushiness with which a third dose is being proposed, US agencies are saying a determination on this is yet to be made, science will dictate the process, and for now, a booster shot is not called for.
admin 
Pharma giant Pfizer has begun pitching for a booster shot of the coronavirus vaccine saying the efficacy of its two-shot regimen declines after six months. But in an implicit rebuke of the pushiness with which a third dose is being proposed, US agencies are saying a determination on this is yet to be made, science will dictate the process, and for now, a booster shot is not called for.
