Epidemics: Fever in Hanoi

The disease strikes abruptly but insidiously, and many treat it as if it were flu. After three days of fever, headache and vomiting, victims often deteriorate rapidly, with skin hemorrhages, nosebleeds, bloody vomiting, clammy hands and feet and abdominal pain. The febrile, blood-depleted patient may enter shock, which proves fatal for half of those who do.

What began in North Viet Nam as the Year of the Cock has become the Year of the Mosquito. Aëdes aegypti, a versatile vector best known as the primary carrier of yellow fever, has brought a crippling epidemic of hemorrhaging dengue-like fever to the...

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