FDA LIMITS the use of Johnson & Johnson's one-shot COVID vaccine due to risk of potentially life-threatening blood clots The FDA is limiting the use of the Janssen COVID-19 vaccine It is now only authorizing the jab to people 18 or older for whom other COVID vaccines aren't available or aren't appropriate Those 18 and older who otherwise would not get a COVID vaccine are also authorized to use the Janssen jab The decision comes after an investigation revealed those who got the vaccine were at increased risk for thrombosis and thrombocytopenia syndrome The syndrome creates blood clots and decreases blood platelet levels Symptoms started in those cases just one to two weeks after receiving the jab