The covid19 pandemic can only be prevented from resurging when at least half the worlds population has become immune to the new virus. And that can happen in one of only two ways, after a number of people have been infected and have recover or have been inoculated with the vaccine. To have the first unmitigated could be a catastrophe. It would mean very many deaths mostly among the elderly and poor people with limited access to health care. The second option, developing a safe effective vaccine and making enough for everybody is a goal that is one year, perhaps two years away. Massive lockdowns and distancing measures cannot be sustained that long. What that means we must curb our enthusiasm for an overnight return to normalcy. Whether the next milestone is may 1, june 1 or something else. We need to prepare for a series of cycles during which restrictions will be repeatedly lessened and replied based on a balance. He said its a threeway tugofwar between combatting the disease, protect