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/

https://www.phcc.org.nz/briefing/long-covid-aotearoa-nz-risk-assessment-and-preventive-action-urgently-needed

https://www.ox.ac.uk/news/2022-08-18-increased-risk-some-neurological-and-psychiatric-disorders-remains-two-years-after

https://academic.oup.com/brain/advance-article-abstract/doi/10.1093/brain/awae101/7638850?redirectedFrom=fulltext&login=false

The People's Air Purifier (cleans air in public spaces, reducing disease):

https://corsirosenthalfoundation.org/instructions/