Some viruses will attack other illnesses so its possible for the virus to help with one aliment while causing another. I wouldn’t recommend them as a health treatment tho! 🙂
Not the same virus Guofu, But some virus don’t make you sick and being in contact with them helps your body create defenses (antibodies) against related virus that can! Also, some virus infect only bacteria, so they can kill bacteria that would harm you.
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