National Update on Measles Cases and Outbreaks - United States, January 1-October 1, 2019. - Patel, Manisha; Lee, Adria D.; Clemmons, Nakia S.; Redd, Susan B.; Poser, Sarah; Blog, Debra; Zucker, Jane R.; Leung, Jessica; Link-Gelles, Ruth; Pham, Huong; Arciuolo, Robert J.; Rausch-Phung, Elizabeth; et al. (MMWR: Morbidity & Mortality Weekly Report, 2019)