A 25-year-old man becomes first in the U.S. to contract coronavirus twice, with second infection more severe – CNBC

Dr. Sonia Macieiewski (R) and Dr. Nita Patel, Director of Antibody discovery and Vaccine development, look at a sample of a respiratory virus at Novavax labs in Rockville, Maryland on March 20, 2020,… [+3889 chars]