Here is some introductory material from a new peer-reviewed paper, which used data from Israel National Emergency Medical Services (EMS) from 2019 to 2021. The study examined the association between the volume of cardiac arrest and acute coronary syndrome EMS calls in the 16–39-year-old population with Covid-19 infection and vaccination rates. It was found that there was an increase of over 25 percent seen in both call types during January–May 2021, compared with the years 2019–2020. This was significantly associated with the rates of 1st and 2nd vaccine doses administered to this age group but were not with Covid-19 infection rates, indicating that it is likely to be the vaxxes responsible for increased emergency cardiovascular events among under-40 population in Israel
https://www.nature.com/articles/s41598-022-10928-z