ECONOMICS (CBSE/UGC NET)

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: -Smallpox arrived on Hispaniola by 1519 and soon spread to mainland Central America and beyond. Along with measles, influenza, chickenpox, bubonic plague, typhus, scarlet fever, pneumonia and malaria, smallpox spelled disaster for Native Americans, who lacked immunity to such diseases.

Detailed explanation-3: -Diphtheria is a serious infection caused by strains of bacteria called Corynebacterium diphtheriae that make toxin. It can lead to difficulty breathing, heart rhythm problems, and even death. CDC recommends vaccines for infants, children, teens, and adults to prevent diphtheria.

Detailed explanation-4: -Diphtheria (dif-THEER-e-uh) is a serious bacterial infection that usually affects the mucous membranes of the nose and throat. Diphtheria is extremely rare in the United States and other developed countries thanks to widespread vaccination against the disease.

Detailed explanation-5: -The explorers and colonists often unknowingly passed the diseases to natives. The introduction of African slaves and the use of commercial trade routes contributed to the spread of disease. The infections brought by Europeans are not easily tracked, since there were numerous outbreaks and all were not equally recorded.