Vaccine-Derived Polio Detected In 2 African Nations; Wild Type 3 Polio Possibly Eradicated, CDC Reports

Media sources report on cases of vaccine-derived polio detected in two African nations, the possible eradication of wild poliovirus type 3, and a WHO report on a recent polio meeting.

Agence France-Presse: Polio cases confirmed in South Sudan, Madagascar: WHO
“The World Health Organization said Friday it had confirmed unrelated cases of polio in South Sudan and in Madagascar, blaming low vaccination coverage…” (11/14).

New York Times: Rare Vaccine-Derived Polio Discovered in 2 Countries
“…New rounds of vaccination will be conducted in December in both areas. … ‘Vaccine-derived polio paralysis’ is a rare but small risk inherent in oral vaccine, so the polio eradication campaign is trying to introduce injectable vaccine wherever it is safe and practical…” (McNeil, 11/14).

BBC News: Polio eradication program reaches ‘major milestone’
“A ‘major milestone’ in the battle to eliminate polio globally has been reached, the U.S. Centers for Disease Control (CDC) has said. Its experts think a second of the three forms of poliovirus has been eliminated after mass vaccination campaigns…” (Gallagher, 11/14).

CDC MMWR: Possible Eradication of Wild Poliovirus Type 3 — Worldwide, 2012
“…WPV type 3 (WPV3) has not been detected in circulation since November 11, 2012. This report summarizes the evidence of possible global interruption of transmission of WPV3, based on surveillance for acute flaccid paralysis (AFP) and environmental surveillance…” (11/14).

WHO: WHO statement on the third meeting of the International Health Regulations Emergency Committee regarding the international spread of wild poliovirus
“…The Committee noted that the international spread of wild poliovirus has continued since 31 July 2014, with at least three new exportations from Pakistan into neighboring Afghanistan. There has been no other documented international spread of wild poliovirus since March 2014…” (11/14).

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