USA HISTORY

Detailed explanation-1: -Notably, diphtheria, pertussis, and typhoid fever are thought to have accompanied the Europeans to the new continent, while dysentery and Streptococcus (scarlet fever) are regarded as diseases that were endemic to North America.

Detailed explanation-2: -Diphtheria is a serious infection caused by strains of bacteria called Corynebacterium diphtheriae that make a toxin. It is the toxin that can cause people to get very sick.

Detailed explanation-3: -Diphtheria (Corynebacterium diphtheriae), an acute bacterial infection spread by personal contact, was the most feared of all childhood diseases. Diphtheria may be documented back to ancient Egypt and Greece, but severe recurring outbreaks begin only after 1700.

Detailed explanation-4: -’ The disease was described in the 5th century BCE by Hippocrates, and epidemics were described in the 6th century AD by Aetius. The bacterium was first observed in diphtheritic membranes by Edwin Klebs in 1883 and cultivated by Friedrich Löffler in 1884.