Additional Study Information: The HIV Vaccine Trials Network (HVTN) and Columbia University Irving Medical Center are doing a study to learn more about SARS-CoV-2 infection and the COVID-19 disease that it can cause. The purpose of this study is to learn more about infection with and recovery from the virus called SARS-CoV-2. Some people know this virus by the name coronavirus. It can cause the disease called COVID-19. You are being asked to take part in this study because you are age 18 or older and have recovered from COVID-19. Your participation in this study will last for at least 1 visit and may last up to about 1 year. These visits could last from an hour to 2 hours. Procedures will include blood draws and optional nasal sample collections at one required visit and 3 optional visits. About 400 people will take part in this study at multiple sites across the United States and South America. The information gained from this study will help us prepare for COVID-19 vaccine studies. You will receive compensation through a reloadable debit card, which will be provided to you.