USA HISTORY

Detailed explanation-1: -When the Europeans arrived, carrying germs which thrived in dense, semi-urban populations, the indigenous people of the Americas were effectively doomed. They had never experienced smallpox, measles or flu before, and the viruses tore through the continent, killing an estimated 90% of Native Americans.

Detailed explanation-2: -Among the “new” infectious diseases brought by the Europeans, smallpox was one of the most feared because of the high mortality rates in infected Native Americans. This fear may have been well-founded, because the Native Americans were victims of what was probably one of the earliest episodes of biological warfare.

Detailed explanation-3: -The American Indians were kicked out of their land and taken over by the Europeans. Large numbers of American Indians died from the diseases brought on by the arrival of Europeans.

Detailed explanation-4: -As Native peoples travel waterways by canoe to trade and share news, they unknowingly take the germs to neighboring tribes. Measles, mumps, chickenpox, smallpox, diphtheria, influenza, pneumonia, typhoid, and the common cold reach Florida and Cuba and begin their deadly march through populations across the hemisphere.

Detailed explanation-5: -Colonization ruptured many ecosystems, bringing in new organisms while eliminating others. The Europeans brought many diseases with them that decimated Native American populations. Colonists and Native Americans alike looked to new plants as possible medicinal resources.