Will Falconer, DVM Moderator
Hey Kathryn, it's less about "strains" of a virus than how people respond to an infectious challenge, and if you look up nux vomica in a materia medica and read what symptoms correlate with it, you'll see nux is a widely applicable remedy for this pandemic, in several different symptom clusters that appear. Dr. Pitcairn is sort of cataloging cases on his Facebook page, but good luck sorting them out, mainly because that platform continually buries older posts.
Here's a read on nux vomica that's online: http://www.homeoint.org/books/boericmm/n/nux-v.htm