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According to the CDC, 90% of measles cases in the US originate from outside the country. In other words, the disease spreads by people travelling. Outbreaks in
by eliteraspberrie 13y ago
According to the CDC, 90% of measles cases in the US originate from outside the country. In other words, the disease spreads by people travelling. Outbreaks in Europe are probably caused by vacationing Europeans, rather than immigrants.