The United States can immediately resume use of Johnson & Johnson's Covid-19 vaccine, top health regulators said on Friday, ending a 10-day pause to investigate the vaccine's link to extremely rare but potentially deadly blood clots.

The Centers for Disease Control and Prevention (CDC) and Food and Drug Administration said in a joint statement that they would warn of the risk of a potentially fatal syndrome involving severe blood clots and low platelets in a fact sheet given to recipients...