Washington state has eliminated exemptions for the MMR vaccine on personal and philosophical grounds.
The vast majority of the cases began while migrants were detained, not beforehand.
The results come amid the worst measles outbreak in the country in 25 years.
A doctor breaks down what you need to know about your immunization status and whether you need a booster or not.
Temple University in Philadelphia had been dealing with a similar outbreak that sickened more than 100 people.
With the disease spreading to new states and the number of cases only expected to rise, here’s what you need to know.
Philadelphia's health department expects the outbreak to continue "for a while longer" and encourages vaccinating.
Researchers examined all children born in Denmark from 1999 to 2010 ― a group of 657,461 children.
Several anti-vax movies appear to have been axed from the streaming service following public scrutiny and a rebuke by Rep. Adam Schiff.