I suggest search this sub over the past few months. This has come up several times.
Short version is some research literature indicates do not fast during a viral outbreak, but good results after.
That said, some of the community have seen good results fasting during a cold/flu, though I recall a recent post where the virus came back after ending the fast.
Personally, I’d suggest a 24-hour DF, refeed with broth and see how your body reacts before going for a longer stretch.
If you do DF please share with a new post. This is a topic a lot of folks seem interested in.