Which of the following strains of wild poliovirus forms the salk type 1 component of inactivated polio vaccine?: (A) MEF - 1, (B) Mahoney, (C) Saukett, (D) Leningrad - 3
Answer is B. IPV is usually made from Mahoney (salk type I), MEF - 1 (salk type II) and saukett (salk type III) that are grown in cell culture. The harvested viral components are inactivated with formaldehyde. Leningrad - 3 is a strain of mumps virus used for making mumps vaccine. Ref: Park, Edition 21, Page - 185