Your thinking is ill-informed. It's been refuted a thousand times. Vaccines are SAFE and EFFECTIVE. Statistically they're perhaps the safest and most effective medical intervention there is, relative to the harm they reduce. But like any medical treatment they aren't 100% effective. Some people will gain complete immunity from the vaccine. Others will gain only partial immunity. And some people can't be vaccinated due to medical reasons.

Every person who refuses to be vaccinated willfully increases the risk of disease to people who receive only partial immunity, along with those who can't be vaccinated.  It's a selfish and ignorant thing to do.

There is no 100% effective medical treatment. By your standards, we should reject them all.