Covid is highly lethal for some category of people..

Note: I corrected my comment to say "debilitating", although relatively "lethal" is probably not inaccurate.

Is not the vaccine available for anyone who wants it? The point of the Yellow Fever vaccine is to get it when traveling to a country where it is prevalent and you don't have the immunity of the local population, and not to bring it back to an unprotected population.

So I'm not sure what your point is. Both diseases are dangerous.

Yellow fever vaccine is mandatory when you travel in a country with high risk.

Covid vaccine will be mandatory when you want to go in situations / places with high risk.

So why would you be against covid health pass and not yellow fever health pass ?

He is saying in general YF vaccine is mandatory when you PASS THROUGH a high risk country (such as kenya) BEFORE going to the coubtry requiring the vaccine (such as tanzania)

Which properties define that category? Edit: the weak and frail, the ones with multiple comorbidities (avg 4)? The ones that are vulnerable for any virus in general?