Not safe and effective? I'm pretty sure that it will reduce the coronavirus effects and will contain any serious illness from the virus and lower any chances of you going to the hospital. And I'm pretty certain it doesn't cause any heart attacks, and you failed to provide any proof at all to why it "causes" heart attacks. again do your research before you make a bold claim like that.
https://www.canada.ca/en/public-health/services/diseases/coronavirus-disease-covid-19/vaccines/safety-side-effects.html#:~:text=Evidence%20indicates%20that%20vaccines%20and,ri
https://www.healthline.com/health/covid-vaccine-heart-attack
Even if does cause heart attacks it doesn't make it effective and useless.