Famous epidemics diseases and causes
In US history there were lots of diseases that wiping out quickly in US such as Small Epidemic in New England, Yellow Fever outbreak in Philadelphia and Asian Flu Pandemic. Those were long time ago in the history. AIDS, what we called HIV, is the new epidemic began to appear as a rare lung infection characterized by a weakened immune system. Lots of people were died because of diseases above but how did they cause the huge damage in people’s healthy?
Epidemics relating to the spread of infectious diseases are caused by the lack of knowledge on specific ways a germ is transmitted and the ability for treatments to be effective in controlling the spread of the disease. There are viruses, bacteria, fungi, and protozoa classifications of disease organisms. Each strain can mutate when exposed in the human body or other living organisms and form new strains of that disease. It is very difficult for scientists and doctors to keep up with this as many environmental factors can influence mutations also. So because of this, until new sanitation preventive measures and treatments are discovered, many diseases spread quickly resulting in an epidemic. These are the disease like Asian flu and Yellow Fever. They were contagious and could jump from one person to the next very quickly. Sneezing projects the flu virus into the air and then it’s breathed in by another person who becomes infected, which people called air-bone disease. However, like AIDS are slower because it cannot travel across the air in sneezes, AIDS is passed when an infected person has sex with another person. On balance, the epidemics diseases are due to lack of hygiene, clean water, clean food, clean hands. Isolating people will reduce the chance of epidemics.
Source:
http://www.healthline.com/health/worst-disease-outbreaks-history#WhoopingCough0
http://www.enotes.com/homework-help/what-causes-epidemics-58197