HomeWorldPfizer says COVID-19 shot 100% effective in adolescents after 4 months Pfizer says COVID-19 shot 100% effective in adolescents after 4 months 0 MU MU November 22, 2021 No serious safety concerns were observed in individuals with at least six months of follow-up after the second dose from The News International - World https://ift.tt/3kYBSyi Tags World Newer Older