Second booster shields elderly from Covid-19 but protection wanes quickly: Study

A vial of the Pfizer vaccine against the coronavirus disease (Covid-19) is seen as medical staff are vaccinated at Sheba Medical Center in Ramat Gan, Israel on Dec 19, 2020. A fourth dose of the Pfizer/BioNTech vaccine lowered rates of Covid-19 among the elderly but the protection against infection appeared short-lived, a large study in...

Pfizer/BioNTech Covid-19 vaccine highly protective in 12-18 age group: US CDC study

The Pfizer/BioNTech vaccine is authorised for children as young as 12, and the companies are seeking authorisation for use in those as young as five years of age.Reuters WASHINGTON - The Pfizer/BioNTech Covid-19 vaccine was 93 per cent effective in preventing hospitalisations among those aged 12 to 18, according to an analysis released by the US...