As the Journal article explains, the first reports suggested that relatively young women who received the vaccines were more likely to have clots, but the EMA reported last week that it could not identify particularly high-risk groups based on its AstraZeneca vaccine data.
The apparent bias in favor of women could be the result of many countries prioritizing immunization of health workers, who are predominantly women.
Nonetheless, identifying possible risk risk factors could allow regulators to better determine the risk of the vaccine versus the risks of COVID-19, which vary with age and other factors, the Nature article notes. .
How to address concerns about blood clots
Call 111 immediately if you have any of these symptoms associated with blood clotting after vaccination.