The U.S. Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) lifted the restrictions on the Johnson & Johnson Covid-19 vaccine on April 23. The announcement came after the FDA’s Advisory Committee on Immunization Practices (ACIP) met for a second time to discuss the data, with the benefits outweighing the risks.

There is a much higher risk of brain blood clots from Covid-19 infection than there is from vaccines against the disease, British researchers said on April 15, after the rollout of inoculations was disrupted by reports of rare clots.