U.S. vaccine advisers recommended adults take a Covid-19 vaccine from Pfizer Inc. or Moderna Inc. over Johnson & Johnson ’s after health authorities said the rate of a rare but serious blood-clotting condition was higher than previously detected.

The Advisory Committee on Immunization Practices voted 15 to 0 to make the recommendation Thursday after hearing updates from Centers for Disease Control and Prevention officials on reports of J&J vaccine recipients experiencing blood clots combined with low blood-platelet levels.