She lived on a farm without indoor plumbing and watched her grandmother, who largely raised her, hand-wash her clothes.

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It is like a giant's wash-hand basin.

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Together they have, for instance, understood that Ghanaians prefer liquid to solid soap for hand-washing and are more likely to wash their hands before eating if the soap does not smell too strong (since Ghanaians often eat with their hands).

ECONOMIST: Just add soap and water

Gerberding credited some shelters for taking steps to minimize those risks, citing one that had set up a long line of portable sinks for evacuees to wash in and others that gave evacuees alcohol-soaked hand wipes.

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