Measles is one of the most contagious diseases known to medicine.
—
Devi Shastri,
Los Angeles Times,
20 June 2026
By this time, smallpox and other contagious diseases brought to the continent by the Europeans had begun to spread among the Aztecs, reducing their capital city’s population by 40 percent in 1520 alone.
—
Jordana Rosenfeld,
Encyclopedia Britannica,
17 June 2026
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