After her husband's death, Johnson, then Halle Dillon, returned home to her family and entered the
Women's Medical College of Pennsylvania at the age of 24, Johnson began her career by taking the Alabama state medical examination, a 10-day oral examination administered by the leading physicians of the state. She began this process by submitting her application to the board of examiners on August 17, 1891, and started the exam soon after. This rigorous exam required participants to give written responses to verbal questions from the state health office. Dr. Dillon scored a 78.81%, 3.81% higher than the requirement to pass (75%). Johnson worked at the Tuskegee Institute from 1891 to 1894. She also was accompanied by her father, who lectured for a year at the institute's Bible School. Johnson's taught up to two classrooms per term, teaching courses on
anatomy and
hygiene. Her contributions at Tuskegee Institute earned her a salary of 600 dollars a year, including room and board, and she was given a month of vacation each year. Additionally, Johnson founded a
nursing school as well, practiced medicine and
pharmacy in the community, and founded the Lafayette Dispensary for locals. == Later life and death ==