Water at informal settlements, where sanitation and waste management facilities were absent, had high bacteria levels.
Cholera kills fast, and outbreaks are common in war-torn regions and after natural disasters where clean water is scarce. A new strategy to prevent cholera infections is a 'cocktail' of live virus.
771,945 have been infected.
Many states in Nigeria are reeling from cholera outbreaks. They need better health and sanitation infrastructure to disrupt transmission of the bacteria which cause the disease.