A new study has found Pfizer’s COVID-19 vaccine can reach 90 per cent effectiveness at preventing infection in teens.

At its peak, the Pfizer COVID-19 vaccine is 90 per cent effective at preventing infection in children aged 12 to 18, according to an international study. 

Researchers at Israel’s Clalit Research Institute have compared infection rates between about 100,000 vaccinated teens in Israel and a similar unvaccinated cohort. 

From a week to 21 days after the second dose, the researchers say the vaccine was 90 per cent effective at preventing infection and 93 per cent effective against symptomatic COVID-19. 

They say during the period of the study, 95 per cent of infections in Israel were from the Delta variant.

The study is accessible here.