Asian flu was a concern when this article was written in 2021. Janet Garman shares things about which human caretakers should be aware. In addition to possible respiratory risks, she names Salmonella sp., Campylobacteria, E. coli and avian flu.
All people who handle birds, coops, and equipment are at risk . . . hand washing is still the best defense.”
Source: Backyard Poultry, August 4, 2021. Link.