(AP Photo/Nam Y. Huh)Which COVID-19 tests are required for international travel? In an effort to limit the spread of new coronavirus variants, many countries are requiring incoming travelers to show a recent negative test. Rapid tests have a turnaround time of about 15 to 30 minutes and are increasingly used to screen people at testing sites, offices, schools and nursing homes. For some rapid tests, users can swab themselves at home. What are the different types of coronavirus tests?