Explainer: Nigeria rolls out world's first full shot against meningitis: Here's what you need to know

Nigeria has rolled out the world's first vaccine against all strains of meningitis. The shot will help ease the burden of disease in Africa's “meningitis belt.” Nigeria has become the first country in Africa's "meningitis belt" to introduce the new Men5CV or 'MenFive' meningitis vaccine. It is the world's first vaccine to...