I think something got lost in translation here. It sounds like you're asking two things: 1. "Will stomach-acid safely neutralize viral particles?" 2. "If that

I think something got lost in translation here. It sounds like you're asking two things: 1. "Will stomach-acid safely neutralize viral particles?" 2. "If that happens, can your immune system usefully learn from the parts Left behind?" AFAIK the answers are "perhaps some, but definitely not all", and "no." Two examples of viral diseases that pass though: https://en.wikipedia.org/wiki/Norovirus https://en.wikipedia.org/wiki/Norovirus , https://en.wikipedia.org/wiki/Hepatitis_A https://en.wikipedia.org/wiki/Hepatitis_A