If he took the shot, he needs Ivermectin. Most likely the artificial spike protien he is creating is in his blood stream. It will connect to his ace2 receptors in his vascular walls. It will create inflammation. Also to his cappullaries helping to create micro blood clots. Also the protein will clump platelettes.

Ivermectin not only attaches to the spike protein to stop it from attaching to ace2s, it UNBINDS already binded spike protein. He may notice a difference in hours after taking it.