I finished six weeks of radiation to the back of the mouth and throat on Dec 16th. I was told that I am not at risk. However, I am a long distance runner with no history of lung issues. I think you should consult your radiologist directly about this issue. We (this forum) are not medical experts. Regardless, we should all be careful because we can pass along the virus to others who are also seeking treatment or healthcare workers. No one going through radiation treatment in the head and neck area should also have to deal with COVID.