The truth is, we don’t know much. Human beings hate uncertainty but cannot escape it, particularly now that our species has become host to a virus that’s never before infected human beings. With 100,000 dead and 1.7 million confirmed cases in the U.S., nobody knows if the reopenings now underway will trigger serious spikes in hospitalizations and deaths, or just scattered hot spots that can be tamped down. Nobody knows if summer heat and humidity will significantly slow the virus’ spread. Nobody knows if there will be a major second wave this fall that doubles or triples the death toll.