"Are any groups more at risk of TTS? No specific risk factors have been confirmed for TTS. In the countries that have reported TTS, more cases have occurred in adults under 60 years of age compared to older adults, and in women compared to men. However it is not yet clear if age and sex are risk factors, since the AstraZeneca vaccine was preferentially given to younger people in some countries, and since women make up a large proportion of the healthcare workers that were prioritised for vaccination."
