This section contains 47 words (approx. 1 page at 300 words per page) |
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Full-scale open-heart surgery is introduced.
Vitamin B-12 deficiency is found to cause pernicious anemia.
Chlorpromazine, marketed as Thorazine, is approved by the Food and Drug Administration for use as a tranquilizer to suppress flagrant symptoms of disturbed behavior.
23 Feb.
Mass trials of Jonas Salk's polio vaccine begin.
This section contains 47 words (approx. 1 page at 300 words per page) |
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