نتایج جستجو برای: poliomyelitis vaccine
تعداد نتایج: 112153 فیلتر نتایج به سال:
Many live virus vaccines derived by empirical routes exhibit temperature-sensitive (ts) phenotypes. The live virus vaccines that have been outstandingly successful in controlling poliomyelitis are the prime example of this phenomenon. The three live attenuated strains developed by Sabin were derived from wild-type isolates by rapid sequential passage at high multiplicity of infection in monkey ...
BACKGROUND Poliomyelitis has historically been endemic in China and has been considered an important cause of disability and death. METHODS We reviewed strategies and measures of poliomyelitis control and eradication from 1953 to 2012. Data from notifiable disease and routine immunization reporting systems and acute flaccid paralysis (AFP) surveillance were analyzed. RESULTS About 20 000 po...
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