24 JanIn the October 13 issue of JAMA according to a study.

A change in the national polio vaccination policy has led to the elimination of vaccine-associated paralytic poliomyelitis A change in the national polio vaccination plan has resulted in the elimination of vaccine-associated paralytic poliomyelitis , in the October 13 issue of JAMA according to a study visit . According to background info in this article, the last case of poliomyelitis in the United States caused by a normally occurring virus occurred in 1979; however, as a consequence of oral poliovirus vaccine make use of that began in 1961, an average of 9 situations of VAPP were verified each year from 1961 through 1989.