Scientists Thought They Had Measles Cornered. They Were Wrong.

Following intensive vaccination efforts, measles cases plunged across the world. Now clusters of new infections — some linked, some not — have confounded health officials. DONALD G. McNEIL Jr. https://ift.tt/2UrcGUW https://ift.tt/2K6EEkS The New York Times Health Measles, Vaccination and Immunization April 3, 2019 at 12:00AM