US recommends ‘pause’ for J&J vaccine over clot reports

US health authorities said they were investigating clots in six women in the days after vaccination.

The US is recommending a “pause” in administration of the single-dose Johnson & Johnson COVID-19 vaccine to investigate reports of potentially dangerous blood clots. In a joint statement on Tuesday, the Centers for Disease Control and Prevention and the Food and Drug Administration said it was investigating clots in six women in the days after vaccination, in combination with reduced platelet counts. More than 6.8 million doses of the J&J vaccine have been administered in the US.