Social & Preventive Medicine Communicable diseases 7af0c8d9 True about polio vaccination is all EXCEPT - A Follow up of AFP for 30 dyas B Salk contains three types of polio virus C Pulse polio doses are extra and supplemental D Oral polio vaccine provides intestinal immunity also High-Yield Explanation <p> Follow up in 60 days. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:203. <\p>