Word: salk
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Dates: during 1950-1959
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...Salk vaccine had nothing to do with most of the improvement in the figures, because only a small proportion of potential victims received it-and many of these got only one injection, of doubtful efficacy. However, the vaccine proved its usefulness: the drop in epidemic severity was much more marked in the 7,000,000 inoculated in the 5-to-9 age groups than among non-inoculated-25% to 50% fewer cases. On the strength of these figures-and with prospects for improved, safer vaccine-Crusader Basil O'Connor of the National Foundation for Infantile Paralysis predicted that...
...combat a polio outbreak in Pearl Harbor, the Navy started inoculating some 22,000 married officers, sailors and marines and their families in the first mass Salk immunization of adults. So far, 19 people have been stricken, the majority of them with paralytic polio, and one pregnant service wife has died. Dr. Robert S. Poos, head of the Navy's Preventive Medicine Unit at Pearl Harbor, blames the outbreak on the mixing up of "new susceptibles and carriers from all over the world," wants to see the Salk vaccine made one of the compulsory shots given to servicemen...
...With Salk polio vaccinations about to resume after the summer stoppage Secretary of Health, Education and Welfare Marion B. Folsom and U.S. Surgeon General Leonard A. Scheele issued preliminary reports on the 1955 vaccination program...
...last week, instead of the scheduled 20 million children, only 6.5 million had been vaccinated. But the effects of the Cutter crisis were not all destructive. The PHS shook up and expanded its Laboratory of Biologies Control. Scientists, led by Dr. Jonas Salk himself, buckled down to the search for an improved vaccine. The National Foundation for-Infantile Paralysis, which rushed the vaccine program prematurely this year, grimly planned a bigger and better program...
...Several laboratories are working on the problem of finding a Type I strain of virus that will produce immunity, but with less danger of accidentally causing paralysis than the Mahoney strain now used in the Salk vaccine, reported Surgeon General Leonard A. Scheele in the A.M A Jour-ml. Researchers at Philadelphia Children's Hospital meanwhile disclosed first details of their method for making a preparation that is virtually pure polio virus (TIME June 20). They use a zinc salt to precipitate the virus, then a centrifuge to separate it from unwanted kidney tissue and chemicals. They concentrate...