A preliminary study published by Israel’s Sheba medical centre found that a fourth dose of the COVID-19 vaccine administered to people 60 years and over, made them three times more resistant to serious illness and twice as resistant to infection than thrice-vaccinated people in the same age group.
Moving forward, Pfizer’s chief executive Albert Bourla said annual COVID-19 vaccine boosters would be preferable to more frequent boosters
At this stage, Pfizer is nearly ready to file for approval for a redesigned vaccine that targets Omicron while still protecting against other variants.
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