Pfizer booster causes similar side effects to second dose, Bloomberg reports 05:44 PFE, BNTX Most people who received a booster shot of Pfizer's Covid vaccine had similar or fewer side effects than they did after the second dose, Bloomberg's Yaacov Benmeleh reports, citing a preliminary study conducted by Clalit Health Services late Sunday. Of the 4,500 respondents to the survey, 88% reported "a similar or better feeling" than their reaction to the previous dose, with 31% saying they had localized effects like pain or swelling in the area of injection, and about 15% of people had other symptoms like tiredness, muscle aches or fever
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