We discussed viral infections and DF recently here: https://www.reddit.com/r/Dryfasting/comments/zbjhiz/does_dryfasting_help_with_colds/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button
I’d suggest maybe a 24 hour, followed by broth for refeeding to test it out. Some have flare ups with DF and some see good results. The literature suggests don’t dry fast with a viral outbreak, but can be helpful after.