Home testing kits will likely be an important part of monitoring Covid-19. Swab tests can tell whether a person is currently infected, while antibody tests look for signs of past infection. But before tests like these are rolled out, researchers need to make sure they're reliable and easy for people to use at home. We gave one of the home testing kits a go, and spoke to researcher Christina Atchison about the REACT (real-time assessment of community transmission) study being run by Imperial College London in the UK.