Instead of allowing your immune system build an immunity to a virus. Vaccines are a miracle. Because instead of your own immune system taking on a virus and overcoming it. The vaccine will do all that for you. Like Testosterone replacement. Instead of your own body building its own testosterone a synthetic replacement for testosterone is introduced. But when you come off the T replacement your own body cannot get back to where it started. therefore it makes less than it did before. With a vaccine which we have now, it isn't like vaccines which were for measles, small pox, or rubella. Because Covid was created in a lab to be stronger than your regular old covid virus. This virus will get stronger, and stronger. Vaccines will no longer be able to keep up.