The U.S.CDC is planning a nationwide study of up to 325,000 people to track how the new coronavirus is spreading.<br />According to a CDC spokeswoman, the study is expected to launch in June or July,.<br />Researchers will test samples from blood donors in 25 metropolitan areas for antibodies.<br />Antibodies are what the immune system creates when fighting the coronavirus.<br />These studies, also known as seroprevalence research, are considered critical to understanding the outbreak.<br />The data can tell experts how the virus is spreading and can help guide decisions on ways to contain it.<br />The study will also help researchers better understand if the immune response to COVID decreases over time.
