Influenza vaccines only started to become available in the 1940s. Are you claiming that human society didn't operate before that?
Influenza also increases the risk of blood clots and ischemia. So SARS-CoV-2 is nothing new in that regard, although the effects appear to be more severe.
Influenza also increases the risk of blood clots and ischemia. So SARS-CoV-2 is nothing new in that regard, although the effects appear to be more severe.
https://vascular.org/news-advocacy/jvs-report-swine-flu-and-...