Hello, doctor, my work colleague has tested positive for covid-19, what protocols should be followed, he is currently in isolation?

COVID concerns.: Your colleague needs to be in isolation. However, the next question is whether you had contact with him. What was exposure like? Were you close to infected person – less than 2 meters? Were you both wearing masks? Did the person appear ill? Sneeze or cough near you? Interaction less than 10 minutes? In a crowded or poorly ventilated room? – (vs being outdoors).