The most lethal disease for all children in past centuries was:

Question

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Smallpox was the most lethal disease for children in the past centuries, causing death or severe disability in a high percentage of cases. It is estimated to have killed over 300 million people in the 20th century alone before it was eradicated by a global vaccination campaign. Polio, rubeola (also known as measles), and anencephaly were also significant health threats but were not as lethal.

The Most Lethal Disease for All Children in Past Centuries