For part 1, see here.
The late summer and early fall of 1843 was not a healthy time in Nauvoo. Philadelphia had yellow fever in the summer (and it emptied the town) and Nauvoo had malaria. If you could survive a year, the general weakness would usually subside and you had a good chance of staying alive. But the elderly and the very young had a more guarded prognosis. Often, malaria teamed up with pneumonia or cholera or some other bug to take out even the robust. In James Adams’ case, cholera got the blame for his August 11 demise: