(Giles Clarke | Getty Images)“Action is needed, not tomorrow, but really now,” said Yap Boum of the Africa Centres for Disease Control and Prevention. He’s talking about a disease that has been around for centuries — cholera — and is rearing its head again in Africa. The plan’s long-term goal is to eliminate cholera as a major public health issue by 2030 — a lofty aim for an ancient infection. This strategy works in about 80% of cholera cases. If cholera is treated quickly – within hours, before a patient’s health declines — fewer than 1% of patients die.