Hundreds of people, including families, attend a rally at the Oregon State Capitol protesting a proposal to tighten school vaccine requirements Thursday, March 7, 2019, in Salem.
(AP Photo/Sarah Zimmerman, file)
FILE -- The Yeshiva Kehilath Yakov School in Brooklyn, where a measles outbreak occurred, April 9, 2019. Legislators trying to curb the numbers of unvaccinated children have been met with vigorous opposition from upset parents. (John Taggart/The New York Times)
States face resistance over vaccine measures : 1 / 2