Not only are there hundreds of doctors in the US who inject disinfectant into people to treat viruses already, there are medical textbooks about it and even an academy for certifying medical practitioners:

https://aaot.us/?

(Technically they advocate taking blood from people, infusing it with disinfectant, and then injecting the infused blood back into people, but close enough.)

I don't know to what extent it's safe or effective, but hundreds of thousands of people have done it without dying at this point and many of them credit it for having healed various problems, so that's something.