Polio Vaccine Undergoes Test; Medical History in the Making NEW YORK The bitst story in medical history is in the making It may become a completed story befor the year is over The story is the new polio vaccine vac-cine which recently passed its first human tests on 90 children and adulU. A creamy vaccine, homogenized homog-enized in mineral oil, gave all J') persons protective antibodies against all three types of virus thai can cause human polio However, Or Jonas E Sull:s. who hus worked on the vaccine warn there will be no polio vaccine vac-cine for general use this summer and thut a groat amount of woil, remains before the vaccine is ready for wide public use The vaccine is the result of Ihr work of hundreds of scientists ami $18,000,000 in March of Dimes funds. It is made out of all three type of polio virus, grown in test tubes and then killed or inactivated with formaldehyde Disarmed this way, the viruses cannot cause polio, but can still stimulate the human body to produce pro-duce antibodies, the agents to fltf! t tff invading live viruses. Three weeks after the vaccine was injected uito muscles, 90 per son ail had antibodies against all thiee types of virus that cause human polio They developed many, or more, antibodies than if they had actually been invaded by live viruses. Dr. Salk said many more careful tests must be made first on hundreds hun-dreds or thousands of people before be-fore the vaccine is ready for wid use. The pace of progress is fast, h; said, but must continue step by step to make sure of this vaccine It was first disclosed last January Dr Salk said scientists working mi the vaccine want to reach their goal as quickly as they ran. but it cannot be done in one day It will be achieved, he suid. if we move cautiously and with understanding under-standing step by step Certain things cannot be hastened, has-tened, since each new step cannot be made without establishing first the wisdom of the one before We are now faced with facts, and not merely with theories With this new enlightenment we can move forward more rapidly and with more confidence, he added The tests were made on children at the D. T. Watson Home fur Crippled Children. Leetsdale. Pennsylvania, Penn-sylvania, and on children and adults at the Polk State School. Polk. Pennsylvania, which treats the mentally retuided