He earned his medical degree from The Johns Hopkins University School of Medicine in 1993 and a master 's degree in public health from The Johns Hopkins University Bloomberg School of Public Health .
Johnson graduated from Morehouse College in 1989 with a degree in chemistry .
Johnson earned Johnson 's medical degree from The Johns Hopkins University School of Medicine in 1993 and a master 's degree in public health from The Johns Hopkins University Bloomberg School of Public Health .
Johnson graduated from Morehouse College in 1989 with a degree in chemistry .