Interesting - Good background on the history of polio vaccines, and there is no question that there have been problems in the past with live attenuated vaccine.
However this report claims: "Poliomyelitis and Acute Flaccid Myelitis are the same."
(see below for related statement) and that
"Enterovirus-D68 is a modification of Salk Type-1."
QUOTE: “Infantile Paralysis was also poliomyelitis or polio for short. AFM has developed from a minor variation in the Salk Type-1 (Mahoney) strain of vaccine virus that has been renamed as EV-D68 and appears following the switch to Medium 199 in Ipol, the Sanofi-Pasteur vaccine now used exclusively in the U.S."
What is the evidence to support this hypothesis? Surely if true the polio vaccine would protect against EV-D68, yet that does not seem to be so:
"Enteroviruses are common viruses. They are common even when we don't hear about outbreaks. They, however, can cause sudden outbreaks of disease. 10-15 million are infected by different strains annually in the US. There is no specific treatment." AND
'"There is no vaccine in the US for enteroviruses, except for polio, which does not work on EV-D68.'"
https://www.verywellhealth.com/enterovirus-strains-and-facts-1958863
Again, where is the scientific evidence that proves a mutant of Salk Type-1 (Mahoney) strain of the vaccine = EV-D68? This is critically important. Both polio & AFM are serious infections and should be prevented.