Scientists said today that blood clots caused by the Johnson & Johnson vaccine are 'extraordinarily rare', as regulators launch a of review four cases linked to the single-dose jab.
The vaccine, also known as Janssen, is yet to be approved for use in the UK, but the Government has ordered 30 million doses.
However, four serious cases of rare blood clots with low platelets were detected in people vaccinated with the jab, one of which died, sparking a review from the European Medicines Authority (EMA).
In the US, four clinics have had to pause J&J vaccinations, after eight people suffered 'adverse reactions' in the latest crisis, coming at a site in Cummings, Georgia.