Answer: Blood clots can occur naturally and are not uncommon. Reports of blood clots received so far are not greater than the number that we would normally expect to see amongst the groups of the population who have been vaccinated. People should still go and get their COVID-19 vaccine when asked to do so.
More than 11 million doses of the Astra Zeneca vaccine have now been administered across the UK. Vaccine safety is of paramount importance and the regulatory agency, the Medicines and Healthcare products Regulatory Agency (MHRA) continually monitors the safety of vaccines in the UK.
For more information and a statement from the MHRA, see this link.