The US coronavirus booster-shot campaign has cleared a crucial hurdle.The Food and Drug Administration on Wednesday authorized booster doses of the Pfizer-BioNTech coronavirus vaccine for older adults and others at high risk from the pandemic. Boosters can be given starting six months after the first two doses of the shot. The agency said that getting a third shot is safe and can help increase protection against the disease.The FDA decision caps more than a month of messy debate over the US vacc
https://www.businessinsider.com/fda-authorizes-booster-shot-pfizer-biontech-covid-coronavirus-vaccine-2021-9
