In a break with federal guidelines, San Francisco allows second COVID-19 booster for all J&J takers

SAN FRANCISCO — Last week, Julia Ma did something the majority of people in the United States can't – she got an authorized second COVID-19 booster shot after one dose of Johnson & Johnson's vaccine.

Ma's J&J shot was followed five months later by a Pfizer-BioNTech booster dose. Her third shot, another Pfizer, put her on par with 86 million Americans who’ve had three doses of either the Pfizer or Moderna COVID-19 vaccine, as a two-dose series plus a booster.