That is exactly the sort of thing someone who wants to make a bioweapon would do. Take a biologic (parasite) that knows how to enter in to the human body and cause mayhem (e.g. herpes, which is most likely a biologic, not a "virus") and put a payload on it of your own concoction (lipid nanoparticles, who the fuck knows). Voilà. Bioweapon.

When we finally get to the bottom of this, the bioweapon will be connected to a parasite that can cause herpes, cancer, and/or malaria. That is my bet.

EDIT: For the Feds reading this, I have no intention or desire to make a bioweapon. I was merely making a point. Go away now.

I didn't read Rainbow Six. But, I do remember that The Military Olympics were held in Wuhan in October 2019. Some (inc myself) believe it was released there. It's a long article and an interesting read.

https://brownstone.org/articles/at-the-military-olympics-october-2019-wuhan-china-athletes-caught-covid/