VOA's health correspondent Linord Moudou talks to Dr. John Sever, vice chairman of Rotary's International PolioPlus Committee. Dr. Sever worked with Jonas Salk, who discovered and developed the first polio vaccine and with oral polio vaccine developer Albert Sabin.VOA's health correspondent Linord Moudou talks to Dr. John Sever, vice chairman of Rotary's International PolioPlus Committee. Dr. Sever worked with Jonas Salk, who discovered and developed the first polio vaccine and with oral polio vaccine developer Albert Sabin.