During the COVID-19 pandemic, antibody tests have been extensively used to:
1. Estimate Seroprevalence: Large-scale serological surveys have been conducted to estimate the proportion of the population that has been exposed to SARS-CoV-2, the virus causing COVID-19. 2. Identify Asymptomatic Cases: Detecting individuals who had asymptomatic or mild infections but never underwent diagnostic testing. 3. Study Immune Response: Understanding the immune response to infection and vaccination, including the longevity and strength of antibody responses. 4. Public Health Decisions: Informing public health policies and strategies for reopening economies and managing healthcare resources.
