Credit: Workers in PPE are seen at the Judiciary Square Covid-19 testing site in Washington, DC, on November 18, 2020. - The United States is home to the world's largest coronavirus outbreak, with nearly 249,000 deaths as of November 18, 2020, according to Johns Hopkins University. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
DC-area volunteers wanted for study understanding spread of COVID-19
