Thesis
Diseases can be caused by different viruses and organisms of non-human origin. Viruses are an integral part of our life. One of the viruses is the influenza virus which is not dangerous by itself, but the complications after the illness can cause different kinds of complications and even death. Infectious diseases have affected human beings since the beginning of time. The infectious disease happens in the case of the interactions of some biological factors and the host within a specific environment.
Introduction
There are a great number of different diseases; some of them are infectious, others are not very dangerous. It is necessary to mention that the most perilous diseases are those that cause different complications after the illness. Thus diseases can be caused by different viruses and organisms of non-human origin. Viruses are an integral part of our life. One of the viruses is the influenza virus which is not dangerous by itself, but the complications after the illness can cause different kinds of complications and even death. Infectious diseases have affected human beings since the beginning of time. The infectious disease happens in the case of the interactions of some biological factors and the host within a specific environment. “Infectious disease occurs whenever conditions are right for a viable pathogen to infect and affect a susceptible host” (Ryan 3).
Discussion
There are many viruses that cause a range of complications, suchlike influenza and AIDS. Besides the history of mankind saw horrible diseases which affected the entire continents; such viruses are known as pandemics. The book “Pandemic Influenza: Emergency Planning and Community Preparedness” written by Jeffrey R. Ryan represents the range of environmental factors of transmission of infectious diseases: biological (susceptible, immune status, vector and host/reservoir), physical (geography, climate, shelter), and socio-economic (demographic, cultural, economic) (Ryan 5). Thus the factors indicate auspicious conditions for the transmission of infectious diseases and the most vulnerable areas of the world systems. There exist three types of influenza viruses; the A-type is the most dangerous as it can cause epidemics and pandemics (Barry 101).
The Public Health Agency of Canada published a guidance document which represents the detailed information on the new virus which affected the population of the whole world; the epidemiology of pandemic H1N1 human influenza is described in order to avoid panic and to clear up the situation with the virus. This document contains all necessary data about the epidemiology, the vaccination and outcomes of the virus:
“In April 2009 a novel influenza A virus (pH1N1) was determined to be the cause of outbreaks of respiratory illness in Mexico and influenza illness in two children in the United States. Within weeks, the infection spread to other parts of North America and to many areas of the world. In response to the spread of the new virus, the World Health Organization (WHO) declared pandemic influenza Phase 6 on June 11, 2009” (Public Health Agency of Canada, 5).
The new virus is considered to have multiple origins. One of the most dangerous viruses of our days is the virus of the A-type which has a non-human origin and can be the reason for spreading it all over the world.
Conclusion
Thus the disease is the abnormality of the organism which is provoked by a virus or another organism of a non-human origin. It affects the human body and causes different malfunctions. The infectious disease is more dangerous than the non-transmitting disease, as it can be transmitted from one individual to another or from animal to people. There are three types of viruses, whereas only one can be the reason for the epidemics or pandemics. The A-type viruses are extremely dangerous for people because they can cause different complications after the illness. Thus the virus is not as dangerous as the complications which can lead to fatal outcomes. The world has recently witnessed the pandemic influenza of the A-type virus. The results of it happened to be deplorable for mankind.
Works Cited
Barry, M. John. The Great Influenza: The Epic Story of the Deadliest Plague in History. London: Penguin, 2005.
Public Health Agency of Canada. “Guidance Document on the Use of Pandemic Influenza A (H1N1) 2009 Inactivated Monovalent Vaccine 2009”. Public Health Agency of Canada. 2009. Web.
Ryan, R. Jeffrey. Pandemic Influenza: Emergency Planning and Community Preparedness. New York: CRC Press, 2008.