A lot. Good reason to stay at home. Anything a rider can do to keep supplies of ppe in stock for those that need them, is worth doing. If that means not riding for a month, so be it.
We can't think about anything even close to the old normal for at least a year. I can't be bothered doing a graph but it would depict a rise in C-19 PPE and hospital equipment going up as cases come down. When the two lines cross we will have achieved some form of equilibrium, possibly in a month or two. Getting qualified staff is a third line on the chart and it takes a long time to manufacture a nurse. Possibly lesser trained people can do some grunt work to give the regulars a break. Where do you draw the legal ethical line? What if, what if, what if......
When supplies equal demand we can't let the whole thing slide backwards so responsible people will not let all of the horses out of the barn at once. Responsible people do not endanger others.