Physicians serving hundreds of North American Jewish communities urge parents to drop refusal to inoculate children against measles

Epidemiologist for Washington State Department of Health says DNA fingerprinting of the strain can be used to locate the source of the outbreak

First quarter of 2019 sees 112,000 reported cases, up from 28,000 in same period last year; in US, ultra-Orthodox vaccine skeptics are epicenter of spread

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