(CNN) – More than a million children already suffering from acute malnutrition are at risk from a cholera outbreak sweeping war-torn Yemen, charity Save the Children warned Wednesday. The charity said it was sending more health experts to the worst-affected areas as it tries to ease the crisis. A ravaged health care system, devastated infrastructure and near famine — the results of a bloody civil war that began in March 2015 — have all contributed to the spread of the disease.