Does trying to live healthy make sense considering an imminent bird flu outbreak?

[FlatAssembler]

Well, I have heard some scientists claiming that, and I haven't heard any claiming otherwise. Therefore, I conclude that is the scientific consensus.

How hard have you looked for those claiming otherwise? Confirmation bias is a bitch. But frankly, i didn't expect anything different from someone who also things that something is "more unlikely" because he suffers from a lack of imagination.

Took me ca. 1min with Google Scholar to find a paper that concludes that "A long-term vegetarian diet, however, seemed to be associated with a lower diversity of T-cell repertoire "

I have not heard of that. Could it be that vegetarians tend to care about hygiene more and thus have been infected with fewer types of germs in their lifetime? This should not impact one's ability to deal with novel viruses, such as COVID-19, as even a previous infection with another coronavirus that attacks humans offers no additional immunity from COVID-19, much less does infection by some other virus.