Health officials held a 125th anniversary celebration Monday for the Maryland Public Health Laboratory, the oldest continuously functioning unit of the state health department, recognizing the long history of disease surveillance and environmental testing that helped inform public health policy. “For decades, the men and women who dedicated their careers to the Maryland Public Health Laboratories have made it their mission to protect Marylanders from disease, research new and emerging health threats, and preserve our lands and waterways from environmental dangers,” Health Secretary Dr. Laura Herrera Scott said at the facility located in Baltimore.