Remdesivir is not a vaccine and vaccines are incredibly safe barring minuscule % of SE which too are not life threatening. May be you meant anti-virals on your last line of the message ?
Not sure why you are making a screed against modern day medicine. Remdesivir was originally developed to battle Hepatitis C. It showed some anti-viral properties against COVID-19 in vitro so was rushed into usage early in the COVID pandemic because doctors had no weapons to fight it. The WHO recommended it not be used after data accumulated.