LONDON, April 7 (Reuters) - British health officials said
they did not know for sure that blood clot risks were directly
associated with only one COVID-19 vaccine.
"This is an extremely rare adverse event, we do not know for
sure that it's related to one vaccine or not yet," said Wei Shen
Lim, chair of the Joint Committee on Vaccination and
Immunisation.
"It may also be relevant to some other vaccine, it may not
even be related to a vaccine, it may be related to COVID
itself."
(Reporting by Guy Faulconbridge and Kate Holton, writing by
William James; editing by James Davey)