This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Comparisons Made With Salk Vaccine
Public Health Service doctor Dr. Joseph Bell says the Salk polio vaccine is 60 to 90 percent effective in field trials for preventing paralytic polio, with immunity lasting uncertainly beyond the first year. He notes smallpox diphtheria and whooping cough vaccines have differing protection levels, while Cutter vaccine investigations continue with no definitive conclusions yet.
MENTIONED IN THIS ARTICLE
Washington
Salk Police
Public Health Service
Joseph Bell
Bell Ia
National Institutes of Health
Ife
Bellaard
Leonard .Scheele
U.S. Public Health iService
Cutter Laboratories
Berkeley
Calif
The
Public Health. Service