The European Union’s drug regulator on Monday gave the approval to administer booster shots of the Pfizer-BioNTech COVID-19 vaccine dubbed Comirnaty to people aged 18 and older. “The [Committee for Medicinal Products for Human Use] has evaluated data for Comirnaty showing a rise in antibody levels when a booster dose is given approximately 6 months after the second dose in people from 18 to 55 years old,” the European Medicines Agency (EMA) said in a statement. “On the basis of this data, the Committee concluded that booster doses may be considered at least 6 months after the second dose for people aged 18 years and older,” it added. The health agency also confirmed it backs giving a third dose of either Comirnaty or Moderna’s Spikevax COVID-19 vaccine to people with severely weakened immune systems at least 28 days after their second shot. The agency said its decision came after studies showed …