There have been cases of blood clotting, severe enough that in some places it is recommended that people under 40 get a different shot. https://www.nhs.uk/cond

There have been cases of blood clotting, severe enough that in some places it is recommended that people under 40 get a different shot. https://www.nhs.uk/conditions/coronavirus-covid-19/coronavirus-vaccination/safety-and-side-effects/ https://www.nhs.uk/conditions/coronavirus-covid-19/coronavir...