The global eradication of poliomyelitis, believed to be achievable around the year 2000, relies on strategies which include high routine immunization coverage and mass vaccination campaigns, along wit
Included are 33 nt sites where all SVK-aVDPV2 differed from PV2 Sabin, and seven sites where a few strains showed back mutation. This did not always result in reversion at amino acid level because of
