.... v (f ; Strici Tests Through Every Process Assure Safety of Salic Polio Vaccine a h . j ; u a , i ' . S. ' . ' 1 4" ; J , -, , j ! temper wvNnnnmmiM"1 1 'hwot""., friwr""T"; i U U', :. : j v..; U : I' ! . k i. ;& ' I"-.- I... fi.it Jir.io in history, n vaccine is protecting millions of human beings from paralytic pclio. While the Salic vaccine will not work in every cflsot American children are beinit safeguarded against the dread disease, with no more risk than ihoy would take in a vaccina-lion vaccina-lion against smallpox or a typhoid ty-phoid shot. The Salk vaccine must pass elaborate tests under the watchful eye of a government govern-ment inspector at every stage of production. Then the final packaged vaccine is approved by the U S Public Health Service Serv-ice for distribution. Here are shown a few of the steps that assure American parents their children arc being given a safe vaccine. tr i im ihii ii 1 1 1 mi i -i ii f iiwi fc. i.i - m n.a This technician Is filtering dead cells and all other foreign matter from polio virus after It has grown on animal tissue In glass containers. Virus Is "cooked" In tank with formaldehyde, (from bottle) until It Is rendered harmless, after which It must pass exacting safety tests. F ' ft ."' ' ""A .Hi! . ... -jr., ... N - '.. i ; . i r ' ( . i A: i ' '.,...( r ? ; i tn -u. j v' ! ' ... iiawwipwi WJWywtfi .w ! Hum iiiiih e iiwi.wv'.tp , - . , I- ' ' ' . - ; r ic'K-J .- e v .v'"J :v;,,a, - 1 It's all over and it didn't hurt a bit! Salk vaccine vac-cine makes this little girl safer now from paralytic par-alytic polio. And her parents feel better tool, Animal tissue In tubes is Inoculated with vaccine vac-cine and let stand. If any live virus remains, .t will multiply here, hence can be detected. This expert Is examining tissue after contact with vaccine, to determine absence of live virus.