The vaccine does not stop covid

It does.

It does not make you immune

Not to all strains, and not completely.

it does not stop you from spreading covid

It does, by reducing symptoms like cough, which spreads the virus in the air, and by lowering your chances of having it on the first place.

and you will have to get another dose after about 3 months

I haven't checked this one, but even if true, it's a small price to pay to not having my friends and loved ones dying.

And then there are possible adverse effects like myocarditis, especially for young men. All this should be considered.

Which are extremely unlikely to happen in comparison to dying of covid.

There are other ways to strengthen your immune system. They should be considered too.

There isn't s way to strengthen your immune system, because it doesn't work that way. You either have a healthy immune system or you are immunocompromised, which may happen when you are particularly fucking up your body with drugs, going through rapid environment changes or suffering with AIDS.

People with a immune system that is too strong (that is, more aggressive and more wasteful of body resources) actually tend to develop auto immune diseases.

Most people that have died due to covid have been severely ill, morbidly obese or very old.

Yeah. And they still deserved to fucking live.

Eating healthy, getting enough exercise and making sure Vitamin D levels are sufficient will make covid much less dangerous. I much prefer that to constantly getting new boosters.

Those are indeed good practices that will lead to a healthier life, and may affect your chances with covid (especially exercise if it's cardio).

However, COVID doesn't care. Being healthier mostly means that you can take a bit more physical damage on average than other people while your immune system tries to fight the infection. It will still fuck you up and possibly cause permanent damage.

Oh, and if you have bad genetics, got wet from the rain in a cold environment, or is just way too stressed out from work? Your chances are pulled down just as much.