Maybe also clean the air in schools and mask in healthcare settings to stop more people getting long-term sick from Covid (which messes up your immune system https://www.nature.com/articles/s41590-021-01113-x ) and other airborne pathogens like measles and TB or future pandemics like bird flu:
https://www.nhs.uk/conditions/covid-19/long-term-effects-of-covid-19-long-covid/
The People's Air Purifier (cleans air in public spaces, reducing disease):