What was the most serious threat to one's health in the early 1900s?

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In the early 1900s, infectious diseases such as tuberculosis, pneumonia, and influenza were the leading causes of death and the most serious threat to one's health. This was partially due to limited medical knowledge and inadequate sanitation and hygiene practices. It wasn't until the mid-1900s that medical advancements helped to significantly reduce the prevalence of infectious diseases.

What Was the Most Serious Threat to One's Health in the Early