poliomyelitis vaccine

Ultimately, Thomas Francis, Jr., director of the Poliomyelitis Vaccine Evaluation Center at the University of Michigan, announced on April 12, 1955 that the vaccine was “safe, effective and potent.”

“After several weeks of confusion about the safety of the new poliomyelitis vaccine, mass tests got underway last month. Walter Winchell had told his radio audience that the vaccine ‘may be a killer’ because one batch had been found with live virus.

Journal reports that a four-in-one shot, with poliomyelitis vaccine added, has been tested successfully on more than 200 children.

We are up to our ears in the Salk poliomyelitis vaccine production.

How soon can a live-virus poliomyelitis vaccine, taken by mouth, supplement or replace the Salk-type, killed-virus vaccine, which must be injected?