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1988年,世界卫生大会(WHA)通过全球消灭脊髓灰质炎(脊灰)的决议。消灭脊灰所使用的主要工具之一就是口服脊灰减毒活疫苗(Oral Poliomyelitis Attenuated Live Vaccine,OPV)。该疫苗廉价、通过口服接种、易于操作,近期疫苗受种者对脊灰野病毒
In 1988, the World Health Assembly (WHA) adopted the global resolution of poliomyelitis (polio). One of the main tools used to eradicate polio is Oral Poliomyelitis Attenuated Live Vaccine (OPV). The vaccine is inexpensive, is administered orally and is easy to handle. Recently, vaccinees have been shown to treat poliovirus