https://www.gov.uk/government/publications/covid-19-vaccination-blood-clotting-information-for-healthcare-professionals/information-for-healthcare-professionals

https://www.gov.uk/government/publications/covid-19-vaccination-blood-clotting-information-for-healthcare-professionals/information-for-healthcare-professionals-on-blood-clotting-following-covid-19-vaccination https://www.gov.uk/government/publications/covid-19-vaccinat... > Given the very small numbers of events reported overall, there is currently a high level of uncertainty in the estimates of the incidence of this condition by age group.