If you dont have illnesses for your immune system to fight, then it doesn't get stronger. Only weaker. And I dont feel like a vaccine should be a replacement for this.
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If you dont have illnesses for your immune system to fight, then it doesn't get stronger. Only weaker. And I dont feel like a vaccine should be a replacement for this.
Your immune system is getting enough stress if you just go out of the door and don't always and everywhere use desinfects.
Also a vaccine IS training . That is how it works.