Why is it three of pres John Tyler's children died on the same day?

Three of President John Tyler's children died on the same day due to the outbreak of a severe illness, likely a form of typhoid fever or another contagious disease, which swept through their household. The tragedy occurred on July 30, 1883, when Tyler's children were still young. The deaths highlighted the vulnerability of families in that era to Infectious Diseases, especially in the absence of modern medicine and public health measures.