United States of America, South Africa and European Union have temporarily stopped the rollout of the Johnson & Johnson Covid jab, after reports of rare blood clotting.
 
Six cases were detected as per the US Food and Drug Administration .All six cases were in women aged between 18 and 48, with symptoms appearing six to 13 days after vaccination.
 
The J&J vaccine has been administered to nearly seven million people in the US, which is around 3% of the total immunisations given so far.
 
South Africa, which was the first country to administer the vaccine, has also paused its use, although no cases of blood clots have been reported in the country.
 
The jab became the preferred vaccine there after studies showed it had a higher protection rate against the South African variant than other jabs. Since mid-February, nearly 300,000 healthcare workers have received it.