School districts in and around Baltimore will be opening virtually for the first term. President Trump continues to state falsehoods about children and COVID-19 – and to urge schools to open for in-person learning. Testing, with results delivered accurately and quickly, remains the key to responding to super spreader events in schools and elsewhere. And for children and adults who need to be tested, what’s the best kind of test to get? Dr. Leana Wen is an emergency physician and the former Health Commissioner of Baltimore City. She’s also a columnist for the Washington Post and a visiting professor and a distinguished fellow at the George Washington U. School of Public Health.