I believe it was actually Dr Robert Malone who made this statement on the Joe Rogan Podcast. He stated that IF you had the original Whuhan covid and recovered you could not get the Delta variant, but you could get the Omicron because it was enough difference.
Malone corrected McCullough’s original statement that IF you recovered from Covid-19 you could NOT get it again. This was incorrect for the above mentioned reason.
Both men clearly have integrity.