I saw that on the "Ingraham Angle" last WED, 8/04. He was from the University of Guelph (Ontario). And yet I haven't been able to find a citation of it on the internet. Basically he hypothesized that COVID virus could easily mutate its single spike protein that the Pfizer/ Moderna "vaccines" causes the human body to produce for supposed immunity. A single protein mutation in the virus would render the "vaccines" ineffectual.
Found it!