Source: Jacqueline Howard, WRAL, 10/21/21

 A booster dose of the Pfizer/BioNTech coronavirus vaccine was found to have a high efficacy -- 95.6% -- against Covid-19 in a Phase 3 trial, the companies announced on Thursday. They noted that "efficacy was consistent irrespective of age, sex, race, ethnicity or comorbid conditions." The trial included more than 10,000 fully vaccinated people, age 16 and older, who randomly received either the 30-microgram booster dose of vaccine or a placebo. The median time between completing their initial second dose of vaccine and receiving a booster or placebo was about 11 months, the companies said.

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