quently figure in the spread of measles to the home. Several studies, including a recent Pittsburgh survey, indicate "at least 80% of pre-school children get measles from an older brother or sister or other school-age contact," Dr. Warren said.F. Robert Freckleton, MD, chief of Immunization Activities in the office of the CDC chief, agreed: "The way measles spreads in a community is primarily among children in the lower grades in school... Then they bring it back home and infect their pre-school siblings."Dr. Freckleton is responsible for administering a federally legislated grants program to assist states and localities in immunizing pre-school children against measles. Eighty-seven project grants are in operation—38 state and territorial, and 49 local health departments "mostly in reasonably large metropolitan areas."