Measles outbreak vaccine:

Discovery

People hold signs at a rally held in opposition to a proposed bill that would remove parents’ ability to claim a philosophical exemption to opt their school-age children out of the combined measles, mumps and rubella vaccine, Feb 8, at the Capitol in Olympia, Wash. Amid a measles outbreak that has sickened people in Washington state and Oregon, lawmakers earlier Friday heard public testimony on the bill. (AP)