Endemic diseases are unknown and epidemics are rare.
The dissemination of plant parasites is favored by many circumstances not always obvious, whence an air of mystery regarding epidemics was easily created in earlier times.
The origin of these two epidemics was obscure.
Yellow fever epidemics are common on the Campeche coast, and sometimes appear at Progreso and Merida.
There were no unusual epidemics during those years, and the rate given may be considered normal.