One of the reasons that it is so hard to detect who has COVID-19 is that the symptoms can greatly vary. Some people can have no symptoms, despite being infected and able to spread the disease. Other people may have symptoms very similar to other conditions such as allergies, colds, or the flu.
Based on the symptoms alone, we have a difficult time determining if someone has COVID-19. But, a new AI program may be able to tell if a cough is from COVID-19 or not.