As New York state continues its aggressive antibody testing, the latest results released by Gov. Andrew Cuomo show that 24.7 percent of people tested in New York City tested positive for having had the virus, with 14.9 percent testing positive across the state. A quarter of New York City’s 8.6 million residents translates to about 2.1 million people, a staggering number considering the city has thus far confirmed only 158,000 cases. The good news is that it may be possible for those who test positive for antibodies to resume more normal activities as they may not be at risk, or...