US regulators have recommended a pause on the use of Johnson & Johnson's Covid vaccine over reports of a "rare and severe type of blood clot" in six out of millions vaccinated.
"Today FDA and @CDCgov issued a statement regarding the Johnson & Johnson #COVID19 vaccine. We are recommending a pause in the use of this vaccine out of an abundance of caution," US drug regulator Food and Drug Administration tweeted.
The FDA said over 6.8 million people had been administered the single dose vaccine in the US and the FDA and CDC (Centre for Disease Control) were reviewing data on six reported cases of a "rare and severe type of blood clot in individuals after receiving the vaccine. Right now, these adverse events appear to be extremely rare," it added.
The cases were being analysed and reviewed, said the FDA.
"Until that process is complete, we are recommending this pause. This is important to ensure that the health care provider community is aware of the potential for these adverse events and can plan due to the unique treatment required with this type of blood clot," said the agency.
Johnson & Johnson's vaccine is the first to be listed by the WHO as one-shot.
Studies have shown that the Johnson & Johnson vaccine is 66 per cent effective in preventing cases of moderate to severe illness and 85 per cent effective against severe cases of COVID-19. It completely prevented hospitalizations and death four weeks after inoculation, according to studies.
New XEC Covid Variant Spreads To 27 Countries, Here's What We Know So Far Study Shows How Long Covid Is Debilitating Children's Health From FLiRT To FLuQE: What To Know About The Latest Covid Variants Amazon Employee Greets Friend At Wedding, Dies Of Cardiac Arrest This Asian City Is Emerging As Sex Tourism Hub. It's Not Where You Think Maharashtra Chief Minister Pick Contentious For Both Ruling, Opposition Camps TIME Magazine Shares Elon Musk's To-Do List, He Responds Newspaper Clipping Claiming Uddhav Thackeray Apologised For 1992 Riots Fake After Bibles And Watches, Trump Is Selling Autographed Guitars For $10,000 Track Latest News Live on NDTV.com and get news updates from India and around the world.