Intended for healthcare professionals

Rapid response to:


Covid-19: Study provides further evidence that mRNA vaccines are safe in pregnancy

BMJ 2022; 378 doi: (Published 12 August 2022) Cite this as: BMJ 2022;378:o2013

Rapid Response:

Safety First

Dear Editor
May I gently take Jacqui Wise to task for her reporting of the Canadian study providing “further evidence that mRNA vaccines are safe in pregnancy”?

This seems to be a follow-on article to a January BMJ news item that she references “Covid-19: Vaccination during pregnancy is safe, finds large US study”.

Had she read the response to that article from GP Dr Ayiesha Malik (1), she might have chosen her words differently. Neither of these studies shows that mRNA vaccines are safe in pregnancy. They may, as Dr Malik pointed out, suggest that they are not known to be harmful.

To put the Canadian study in perspective, it looked at adverse events occurring in the seven days after immunisation, i.e. 2.5% of the duration of a pregnancy.


Competing interests: No competing interests

12 August 2022
Peter Selley
Retired GP
Crediton, Devon