As we learn more about COVID-19, the vast array of symptoms continues to puzzle health professionals. Some people experience mild symptoms, others experience severe symptoms and some people experience none at all. People who experience no symptoms are called “asymptomatic carriers.”. There are some people who are truly infected, but they don’t get sick, Stephen Gluckman, via HuffPost. But how Long Can Asymptomatic COVID-19 Carriers Infect Others?