The 15-decade drive to control and eradicate polio through immunization [1] has benefited from the availability of 2 excellent vaccines, the inactivated poliovirus vaccine (IPV) of Salk and colleagues, licensed in 1955, and the live attenuated oral poliovirus vaccine (OPV) of Sabin, licensed in 1961. The 2 vaccines have complementary advantages, and both have played—and continue to play—importa...

Nigeria is a large West African country, more than 900 000 km more than 900 000 km 2 2 in area – nearly in area – nearly four times the size of the UK. Despite four times the size of the UK. Despite having a population of about 117 million having a population of about 117 million people, 42% of whom live in cities, Nigeria people, 42% of whom live in cities, Nigeria has about half the populatio...

Departments of Ear, Nose & Throat,Pathology, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria *Correspondence: Dr K R Iseh, Department of Ear Nose and Throat, Usmanu Danfodiyo University Teaching Hospital, Sokoto, Nigeria E-mail: [email protected] Abbreviations: DNA, Deoxyrebonucleic acid; EBV, Ebstein Barr virus; NPC, Nasopharyngeal cancer; UICC, Union International Centre le Canc...