To add, from the German Federal Institute for Vaccines (regarding AZ not J&J):
> Birth control pills can also cause thrombosis. So why is there all the fuss about the COVID-19 Vaccine AstraZeneca?
> It is true that for birth control pills thromboses, even with fatal outcome, are known as a very rare side effect. They are listed in the Summary of Product Characteristics (SmPC). The birth control pill is available only on prescription. Every woman must be informed of this risk by the prescribing physician. For the COVID-19 Vaccine AstraZeneca, there is currently a suspected very rare side effect of sinus vein thrombosis with accompanying platelet deficiency, sometimes fatal. It is not listed in the SmPC.
> Birth control pills can also cause thrombosis. So why is there all the fuss about the COVID-19 Vaccine AstraZeneca? > It is true that for birth control pills thromboses, even with fatal outcome, are known as a very rare side effect. They are listed in the Summary of Product Characteristics (SmPC). The birth control pill is available only on prescription. Every woman must be informed of this risk by the prescribing physician. For the COVID-19 Vaccine AstraZeneca, there is currently a suspected very rare side effect of sinus vein thrombosis with accompanying platelet deficiency, sometimes fatal. It is not listed in the SmPC.
https://www.pei.de/EN/service/faq/coronavirus/faq-coronaviru...