Delaying second Pfizer COVID-19 shot boots antibodies more than three-fold in elderly, U.K. study finds
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(MENAFN - Gulf Times) A Spanish study on mixing Covid-19 vaccines has found that giving a dose of Pfizer's drug to people who..
COVID-19 vaccines finally are headed for more kids as U.S. regulators on Monday expanded use of Pfizer's shot to those as young as..