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Stickers sit in a tray at a vaccination station ahead of a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
Stickers sit in a tray at a vaccination station ahead of a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A vaccination station is set up ahead of a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A vaccination station is set up ahead of a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A combination measles, mumps and rubella vaccine stand in a tray at a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A sign is posted outside a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A flyer is displayed at a Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
Community Health Nurse Beth Smith prepares a combination measles, mumps and rubella vaccine at Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A combination measles, mumps and rubella vaccine is prepared at Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)
AP
A combination measles, mumps and rubella vaccine is displayed at Pennsylvania Department of Health measles vaccination clinic located in Lancaster County in Peach Bottom, Pa., Tuesday, Oct. 20, 2026. (AP Photo/Matt Rourke)