Fair enough. I was solely relying on the literal context of the quoted passage from Breakthrough, “...On April 12, 1955, the world learned that a vaccine developed by Jonas Edward Salk, M.D., could be relied upon to prevent paralytic poliomyelitis.” Thanks for the response.
Fair enough. I was solely relying on the literal context of the quoted passage from Breakthrough, “...On April 12, 1955, the world learned that a vaccine developed by Jonas Edward Salk, M.D., could be relied upon to prevent paralytic poliomyelitis.” Thanks for the response.