One of my g-g-grandfathers was imprisoned at Point Lookout. He fought the entire war (wounded at First Manassas) and was captured in 1864 and sent to Point Lookout. One of my wife’s g-g- grandfathers died while imprisoned at Fort Delaware and is buried in a mass grave in New Jersey. Even though the North had better resources, the Confederqate death rate while prisoners of war was about the same as Union POWs.
My G Uncle on my father’s side, fighting with the 3rd NC Regiment was taken POW on the 3rd day of fighting at Gettysburg and send to Point Lookout, where he died in captivity in December 1863. His name is enscribed on the huge memorial for Confederate dead.