2,994
回編集
差分
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**in recent 12 months no local transmission in Southeast Asia
*cVDPV3 is not identified so far
*duration of activity in environment/sewage
*how to keep activity in environment/sewage
*where the sabin virus obtains mutation to VDPV
*threshold of immunization coverage to maintain VDPV free
==Global Polio Eradication
