I'm going to take this as an opportunity to hike the hike less traveled. There are lots of trails out there that take a 3-10 days where you can supply at home and not have to worry about closures, etc. Many of those trails don't have such disease vectors as shelters where hikers congregate. I might do some off-trail wandering, too. And then there are all those lists to tick off: 4,000 footers, fourteeners, etc. One guy I worked with chose to hike every peak he could see from the hill behind his house, trail or not.
We may have to change our habits for a while, perhaps permanently, but there's no need to avoid enjoying the outdoors.