The US Food and Drug Administration (FDA) announced late last week that it has suspended the license for French drugmaker Valneva's chikungunya vaccine, saying that continued administration of the vaccine to the public would pose a danger to health.

Less than three weeks after lifting a pause on the use of Valneva’s chikungunya vaccine Ixchiq, the FDA has done an about-face, banning the use of the shot in the United States. | Less than three weeks after lifting a pause on the use of Valneva’s chikungunya vaccine Ixchiq,

Shares of French drugmaker Valneva slumped more than 20% on Monday after the U.S. Food and Drug Administration suspended the licence for its chikungunya vaccine, Ixchiq, with immediate effect, citing serious safety concerns.