Disappointed Federal Health Officials Lose Faith in Johnson & Johnson Vaccine

The Biden administration has stood by Johnson & Johnson as the vaccine maker struggled to deliver promised doses of its Covid-19 vaccine — but privately, frustrated senior health officials have largely written off the shot, according to seven people with knowledge of the matter.
Johnson & Johnson, which has a long history of successful vaccine development, was one of the government’s first and biggest bets in the coronavirus vaccine race. But the company has faced an unrelenting series of setbacks, including a contractor mix-up that ruined 15 million doses and revealed serious safety and hygiene lapses, and concerns that the vaccine may be linked to recent reports of rare, severe blood clots among recipients.