Researchers say antibodies, made by the human body to fight the new coronavirus, could last for at least four months. Earlier reports suggested that these special proteins disappeared quickly. Galit Alter and Dr. Robert Seder are scientists from Harvard University and the U.S. National Institutes of Health. They wrote in the New England Journal of Medicine, “This study provides hope that host immunity to this unpredictable and highly contagious virus may not be fleeting.” The report, released this week, came from tests on more than 30,000 people in Iceland over four months. It is the most complete study yet on one of the body’s natural defenses against the new coronavirus.