Dear Editor
Good to see this balanced piece from Prof Hunter and good to see the Netherlands study referred to. This is probably the most appropriate data on pre-Covid CVST incidence available and suggests the 22 cases found in the first 15.8 million first doses of AZ vaccine is significantly lower than expected in an unvaccinated population of that size. I provided further information on this in my Response to a recent BMJ editorial including the reference to the original study.[1]
1. Mahase E. AstraZeneca vaccine: Blood clots are “extremely rare” and benefits outweigh risks, regulators conclude. BMJ 2021; 373 doi: https://doi.org/10.1136/bmj.n931 (Published 08 April 2021) Cite this as: BMJ 2021;373:n931
Rapid Response:
Re: Thrombosis after covid-19 vaccination
Dear Editor
Good to see this balanced piece from Prof Hunter and good to see the Netherlands study referred to. This is probably the most appropriate data on pre-Covid CVST incidence available and suggests the 22 cases found in the first 15.8 million first doses of AZ vaccine is significantly lower than expected in an unvaccinated population of that size. I provided further information on this in my Response to a recent BMJ editorial including the reference to the original study.[1]
1. Mahase E. AstraZeneca vaccine: Blood clots are “extremely rare” and benefits outweigh risks, regulators conclude. BMJ 2021; 373 doi: https://doi.org/10.1136/bmj.n931 (Published 08 April 2021) Cite this as: BMJ 2021;373:n931
Competing interests: No competing interests