![The US Food and Drug Administration and the Centers for Disease Control will stop using the Johnson & Johnson Covid-19 jab at federal vaccination sites and has asked states to pause its use while they investigate its safety](https://si.wsj.net/public/resources/images/FN-AN250_JJvacc_M_20210413073755.jpg)
The US is set to halt the use of Johnson & Johnson’s single-dose coronavirus vaccine after six recipients developed rare blood clot conditions, US federal agencies said.
The US Food and Drug Administration and the Centers for Disease Control said in a joint statement they were recommending a pause in the use of Johnson & Johnson's Covid-19 jab "out of an abundance of caution".