Pfizer's COVID-19 vaccine trial data shows long-term protection in adolescents aged 12 to 15 years
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Pfizer Inc said on Monday its COVID-19 vaccine provided strong long-term protection against the virus in a late-stage study conducted among adolescents aged 12 to 15 years. A two-dose series of the vaccine was 100% effective against COVID-19, measured seven days through over four months after the second dose, the company said.