US regulators have recommended stopping the use of Johnson & Johnson's COVID-19 vaccine, as they investigate rare blood clotting in six women. Johnson & Johnson also said it was stopping the rollout of its vaccine in Europe. The move comes after Europe's drug regulator earlier this month said it had found a possible link between AstraZeneca's COVID-19 vaccine & very rare blood clots in some adults who had received the shot. Britain's health regulator, meanwhile, has recommended people under the age of 30 to get an alternative COVID-19 vaccine, if possible, rather than the AstraZeneca jab. Watch the video to know more.