Video: 'Experts Revealed The Real Reason Why William Henry Harrison Died After Less Than A Month In Of'

(Sunday, April 4, 1841, 12:30 a.m. local time) — U.S. President William Henry Harrison, 68, died early today at the White House, becoming the first United States president to die in office.

Harrison, who died after serving only 30 days, twelve hours, and 30 minutes in office, was succeeded by Vice President John Tyler, who would be sworn in on Apr. 6, 1841.

On March 26, 1841, Harrison became ill with cold-like symptoms. The prevailing misconception at the time was that his illness had been caused by the bad weather at his inauguration three weeks earlier, in which Harrison delivered a numbingly long Inaugural Address (at 8,445 words, the longest in history) in wet, freezing weather without a hat, overcoat or gloves.

But in 2014, Jane McHugh and Philip A. Mackowiak concluded that Harrison likely died of septic shock due to “enteric fever” (typhoid or paratyphoid fever) after they did an analysis (in Clinical Infectious Diseases), examining notes taken by Harrison’s doctor, Thomas Miller, and records showing that the White House water supply was downstream of public sewage.