Why the world is just waking up to the power of immunisations to tackle this infectious disease and how we’re learning more with every rainy season.
Even if your child has been vaccinated, booster shots provide an extra layer of protection.
Every dollar spent on vaccines brings a 16-fold return on investment — and up to $44 for every dollar if broader benefits are taken into account.
The disease kills more than a million people a year but the world's response to it is totally inadequate.
The residents of a Nigerian village had no health services, save for traditional methods, to treat those with a fever and a rash.