We look at the research, at times evolving, behind the safeguards promoted to help prevent COVID-19. As much as scientists have learned about this coronavirus, questions remain - from the six-feet-apart rule to the most effective way to wear a mask. If you have questions about COVID-19 -- including on where, how, and when to get tested -- visit this NH DHHS site . You can register for a test here . Air date: Wednesday, June 10, 2020.