If there is trouble somewhere in the world, Michael V. Callahan ... and controversial laboratory accidents resulting in the infection of scientists at foreign biohazard laboratories. But Callahan’s ...

Michael Callahan directing an air evacuation of a U.S. serviceperson with infectious disease from Africa Michael V. Callahan, M.D., DTM&H (U.K.), M.S.P.H., doesn't wear a military uniform, but he ...

Michael Callahan didn’t have all that much time to process his looming NHL debut. After all, the 25-year-old defenseman only found out on Tuesday morning. The turnaround was so short that the ...