There are also other, novel things we could do to fight infectious diseases that get pretty much no traction. Far-range UVC lights immediately come to mind. These kill viruses and single-celled organisms quickly while not harming humans. Just imagine this installed in all public, closed spaces! Schools, offices, restaurants, public transit all could be heavily reduced in how well any infectious diseases gets spread there. Yet, this is almost entirely absent from public discourse.
Beware of unintended consequences. Humans evolved with constant exposure to pathogens. Living in overly sterile environments seems to be a risk factor for autoimmune disorders.
I wonder if we could address this by not activating the lights everywhere all the time. Always on in hospitals and other places with vulnerable people. Only on in restaurants and public transit during time of increased thread like a pandemic or maybe flu season, since that in fact kills a lot of people.
https://www.nature.com/articles/s41598-020-67211-2