Pfizer Inc and BioNTech on Tuesday requested the US Food and Drug Administration (FDA) to authorise booster doses of their Covid-19 vaccine in all adults, presenting recent data showing the shot would help prevent disease across ages.

Over the past several months, the FDA has authorised Pfizer's boosters for people who are immunocompromised, those who are aged 65 and above, all people at high risk of severe disease, and people...