Or you can take your cue from Dr. Ephraim Engleman, who was an immunology giant who by most standards lived forever. At one hundred and four, he got his driver’s license renewed. He still commuted to the office to study autoimmune disease. He died just shy of his hundred and fifth birthday. He was in his lab, at the University of California at San Francisco, where he pioneered research into causes and cures of rheumatoid arthritis. The
