Is anyone using the short school day /two classes method? Given how the Finnish system works, it sounds promising.
Re susceptibility to SARS-CoV-2, I think this paper has a lot of the answer, especially for older people:
https://www.biorxiv.org/content/10.1101/2020.04.17.047480v2
Agree with the Vitamin D, C, and zinc. Also take nicotinamide riboside (a B3 variant) to raise PARP10 levels. (Recent paper on this):
https://www.biorxiv.org/content/10.1101/2020.04.17.047480v2
And don’t forget to stagger around the neighborhood biting everyone… millions of movie fans have been waiting for this for decades.