Cryosols is a valuable reference for soil scientists, ecologists, biologists, agronomists, foresters, and conservationists interested in the permafrost region. Springer.com Cryosols
Polio, which struck children disproportionately, could attack the central nervous system and cause muscle deterioration, paralysis and even death. American virologist Jonas Salk, who was born 100 years today on October 28, 1914, developed the worldâs first safe and effective polio vaccine.
Jonas Salk became a national hero when he allayed the fear of polio with his vaccine, approved in 1955. Although it was the first polio vaccine, it was not to be the last; Albert Sabin introduced an oral vaccine in the 1960s that replaced Salkâs. Polio Season. In the first half of the 20th century, summer was a dreaded time for children.