If you expect it to spread at the rate this thing spreads, after a couple of years nearly everyone will have been exposed to it and thus have developed an immunity (or died). From then on it mostly becomes a childhood disease, like measles. The goal thus becomes to spread out the exposures enough so that people who need medical help to survive their exposure can reliably get it.

Of course the above assumes that immunity really does develop after one exposure, and that the virus doesn't mutate into some sufficiently different form to reset the immunity counter to zero again. The evidence seems to indicate positive things on the immunity front, but it's still preliminary. And as for mutation, who can say?