Doctor J. Michael Lane, a globe-trotting epidemiologist, waged a 13-year war against smallpox dead at 84

Dr. J. Michael Lane, a globe-trotting epidemiologist who waged a 13-year war against the scourge of smallpox and led the final drive for its global eradication in 1977, when the last known vestige of the disease was snuffed out in…