The virus mutates and that is what overrides any prevention that any vaccine can offer. A vaccine will offer a much reduced preventive effect but Covid is a rapidly evolving virus. Covid-19 is a worldwide problem and we cannot stop it. Get the vaccinations and lessen the impact of the symptoms. It's a no brainer.
The vaccine does not work, that is what anyone with a brain can see. Strengthen your immune system, everyone can understand the benefit in that.
Vitamin D -- deficiency is strongly correlated to the severity of your illness if you have Covid19.
Quercetin and Zinc -- Two nutrients you can get at the vitamin isle of your store, they strengthen your immune response to viral infections. Quercetin is likened to a gun and zinc to the bullets.
Social distancing -- reduces the viral load if you do get exposed to a virus. This can explain the differences between those who go to the ICU, two weeks in bed, or have no idea they were exposed.
HCQ -- helps you fight every virus, not just Covid19 -- it behaves similar to "salt" that Jesus said was good. Salt will remove water from any cell, doesn't matter which one. HCQ will oxidize any virus, doesn't matter which one. This is most effective when you feel like you are first coming down with something.
Wash your hands with soap and water -- this is a healthy practice. Do not use hand sanitizer except in "emergency" situations. Soap and water will cause everything on your hands to be washed off, the effect is to reduce the "viral load" if you are exposed. Hand sanitizer creates an environment that favors the 1% of germs it doesn't kill. If any of those are pathogens then you have made your hands a far better place for them to multiply.