Influenza is an acute respiratory illness caused by infection of influenza A and B viruses. The disease can affect both the upper and lower respiratory tract and is often followed by systemic signs and symptoms, such as: sudden onset of fever, chills, non-productive cough, myalgias (muscle pain), headache, nasal congestion, sore throat, and fatigue. (Cox et al.1998). Influenza viruses evolve continuously, challenging mammalian and avian hosts with new variants and causing complex epidemic patterns with regard to age, place, and time. Human influenza viruses cause disease through a variety of direct and indirect pathological effects. The direct effects include destruction of infected cells, damage to respiratory epithelium, and immunological responses that cause general malaise and pneumonia. Indirect effects of infection include secondary bacterial infections due to the tissue damage and other disease such as cardiovascular disease, renal disease, diabetes or chronic pulmonary disease (Schoenbaum S.1996). In the USA, clinical illness affects 5–20% of the population and asymptomatically infects a larger number (Noble G.1982). Infants, who are exposed to influenza epidemics as a novel antigenic challenge after maternal antibodies decline, may have attack rates as high as 30–50% in their first year of life, depending on the frequency of contacts with older siblings (Glezen et al.1997). For reasons, influenza viruses cause epidemics in the northern and southern hemisphere during their respective winters. In the tropics, the timing of activity is less defined, with sometimes year-round circulation or bi-seasonal peaks during the year (Viboud et al.2006).
There are three types of influenza;
Seasonal influenza: Spread of seasonal influe...
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...creased risk for complications of influenza.
Although the absolute number of deaths does not always differentiate a pandemic from severe non pandemic seasons, the age distribution of influenza-related deaths has noticeably illustrious pandemics from the interpandemic seasons instantly preceding them. Persons under 65 years of age accounted for half of the influenza-related deaths in the United States during the 1968–1969 influenza pandemic, but far smaller proportions during the decades following the pandemic.
A similar pattern was seen in the United States for all three pandemics of this century (Simonsen et al.1998). Thus, younger persons were at a 20-fold high risk for influenza-related mortality during a pandemic, whereas the elderly faced roughly the same risk during a pandemic as during later severe inter pandemic seasons subjected by the same virus subtype.
The 1918-1919 influenza pandemic stretched its lethal tentacles all over the globe, even to the most remote areas of the planet, killing fifty million people or possibly even more. Influenza killed more people in a year than the Black Death of the Middle Ages killed in a century, and it killed more people in twenty-four weeks than AIDS has killed in twenty-four years.3 Influenza normally kills the elderly and infants, but this deadly and abnormal strand claimed young people, those in their twenties or thirties as its target victims. Such was the case for Jules Bergeret. Jules was a “big, strapping man” who owned a tavern during the epidemic, and on December 11 he celebrated his 32 birthday. Within two weeks Jules, his mother, his sister, and his 25 year old wife all fell victim to the flu, and on December 22 he was dead.4 The virus left victims bleeding out of their nose ears and mouth; some coughing so hard that autopsies would later show that abdominal muscles and rib cartilage had been torn. Victims ...
The Influenza virus is a unique respiratory viral disease that can have serious economic and social disruption to society. The virus is airborne transmitted through droplets release by coughing or sneezing from an infected person or by touching infected surfaces. Symptoms range from mild to severe and may even result in death. People with the virus usually experience fever, headache, shivering, muscle pain and cough, which can lead to more severe respiratory illness such as pneumonia. People most susceptible to the flu virus are elderly individuals and young children as well as anyone whose health or immune system has been compromise. The most effective way to counteract the influenza virus is to get the flu vaccine which is available by shots or nasal spray before the flu season as well as practicing safe hygiene. (CDC, 2013)
The influenza or flu pandemic of 1918 to 1919, the deadliest in modern history, infected an estimated 500 million people worldwide–about one-third of the planet’s population at the time–and estimates place the number of victims anywhere from 25 to 100 million. More than 25 percent of the U.S. population became sick, and some 675,000 Americans died during the pandemic. The 1918 flu was first observed in Europe, the U.S. and parts of Asia before swiftly spreading around the world. Surprisingly, many flu victims were young, otherwise healthy adults. At the time, there were no effective drugs or vaccines to treat this killer flu strain or prevent its spread. In the U.S., citizens were ordered to wear masks, and schools, theaters and other public
--------------------------------------------------------------------- [1] Essen, G. A., "The Socio-Economic Impact of Influenza". http://www.eswi.org/Bulletin_October_1997.cfm [2] Frayha, Husn. " Influenza Vaccination: A Call for Action" http://www.kfshrc.edu.sa/annals/176/97-248R.html [3] "Influenza". http://www.caw.ca/whatwedo/health&safety/factsheet/hsfssubstanceno37.asp
"Pandemic Flu History." Home. U.S. Department of Health & Human Services, n.d. Web. 23 Mar.
One of the most virulent strains of influenza in history ravaged the world and decimated the populations around the world. Present during World War I, the 1918 strain of pandemic influenza found many opportunities to spread through the war. At the time, science wasn’t advanced enough to study the virus, much less find a cure; medical personnel were helpless when it came to fighting the disease, and so the flu went on to infect millions and kill at a rate 25 times higher than the standard.
The Influenza Pandemic of 1918-1919 occurred during the midst of World War I, and it would claim more lives than the war itself. The disease erupted suddenly without a forewarning and spread rapidly across the globe. It seemed as though all of humanity had fallen under the mercy of this deadly illness. Influenza had very clear symptoms as described by William Collier in his letter to The Lancet. After a patient seizes their temperature can run up to 105° or more while their pulse averages at about 90 beats per minute. The high temperature and low pulse are frequently combined with epistaxis (nosebleed) and cyanosis (blueness of the skin). The epistaxis is caused by the high temperature and the cyanosis is caused by a lack of oxygen due to the decreased pulse (Kent 34). The author of Influenza Pandemic of 1918-1919, Susan Kinglsey Kent, provides a brief history of the pandemic and documents from the time period. Many of the included documents show how unprepared and unorganized governments attempted to contain and control a disease they had never experienced, and how the expectations of the governments changed as a result of their successes and failures.
These pieces of history may have faded from memory, but with the upcoming threat of an avian flu that can jump from human to human, people must learn from the past to combat the future. From the time of its first recorded incident in 412 BC (Adams 1) to 1918, influenza was never taken seriously. With symptoms similar to the common cold, most people disregarded influenza as a minor illness, nothing more. As Lynette Iezzoni quoted in her book, Influenza 1918, influenza was thought to be “quite a Godsend! Everybody ill, nobody dying” besides the very old and feeble (16).
Influenza is a major public health problem which outbreaks all over the world. Resulting in considerable sickness and death rates. Furthermore, it is a highly infectious airborne disease and is caused by the influenza virus. Influenza is transmitted easily from one person to another person which has a great impact on society. When a member of society becomes sick, it is more prone to spread to other people. In the United States, every year between 5 to 20 percent of the population is affected by influenza. As a result of this, between 3,000 and 49,000 deaths have occurred per year (Biggerstaff et al., 2014). Therefore, the influenza vaccine is the most effective strategy to prevent influenza. This essay will examine two significant reasons for influenza vaccination which are the loss of workforce and economic burden as well as one effect regarding herd immunity.
Influenza is very contagious and spreads rapidly from person to person. Influenza causes worldwide yearly epidemics. According to World Health organization Influenza affects 5-15% world’s population and resulting in 500,000 deaths yearly. Ottenberg stated that, in United States, an average of 200,000 were hospitalized and 36,000 died each year from influenza complications. Influenza is the sixth leading cause of death among US adults and is related to 1 in 20 death in persons older than 65 years. Disease control and prevention estimates indicate that infections like H1N1 which is one of the types of influenza, have resulted in an estimated 42 to 86 million cases and 8520 to 17620 deaths. As I mentioned earlier that infections like influenza are very contagious, they can spread easily from hcw to Patient and back to hcw. The most efficient and effective method of preventing influenza infection is vaccination(The best way to prevent influenza is with annual vaccination).(Sullivan,2010) (Gregory,Tosh &Jacobson, 2005). Motivated by a desire to actively avoid illness Influenza may increase the risk for death in people with existing heart, lung, or circulation disorders. In fact, the higher than average number of winter deaths in people with heart disease may be due only to the occurrence of influenza during those months.Vaccination provides immunity to fight against infection.To increase resistance to harm by modifying the environment to minimize preventable illness (NEED TO CHANGE WORDING)
In the fall of 1918 influenza appeared for the first time in pockets across the globe. At first it was pushed aside as a case of the common cold. The influenza of that season, however, was far more than a cold. In the two years that this scourge ravaged the earth, a fifth of the world's population was infected. (1) Including twenty-eight percent of all Americans. In those two years an estimated six hundred and seventy-five thousand Americans died because of influenza. This was the greatest scare Americans had ever seen from a single disease. People between the age of twenty and forty were at the greatest risk of infection. Even President Woodrow Wilson suffered from the flu in early 1919 while negotiating the crucial treaty of Versailles to end the World War. The public health departments distributed gauze masks to be worn in public. Stores could not hold sales; funerals were limited to 15 minutes. Some towns required a signed certificate to enter and railroads would not accept passengers without them. (1) Influenza had killed nearly as many American servicemen as died in battle, ten times and over that number of American civilians, and twice as many people in the world as died in combat on all fronts in the entire four...
Influenza is defined as an acute, commonly epidemic disease, occurring in several forms, caused by numerous rapidly mutating viral strains and characterized by respiratory symptoms and general prostration. Spanish flu was more than just a normal epidemic, it was a pandemic. Epidemics affect many people at the same time in areas where the disease doesn’t normally occur. A pandemic is an epidemic on a national, international, or global scale. The Spanish flu was different from the seasonal flu in one especially frightening way, there was an unusually high death rate among healthy adults aged 15 to 34 and lowered the life expectancy by more than ten years. Such a high death rate has not occurred in this age group in and epidemic prior to or since the Spanish flu pandemic of 1918. (Tumpey, 2005)
Illnesses have long haunted the human race. As long as these illnesses have existed, humans have developed ways to cure themselves, beginning with simple herbs and proceeding as far as vaccines and complex medicines. One cure that long eluded scientists was that of the influenza virus. Now, the influenza vaccine, or flu shot, saves thousands of lives a year and helps prevent serious complications resulting from influenza infection.
“The Influenza Pandemic of 1918.” Billings, Molly. Stanford University Virology. June 1, 1997. retrieved from http://virus.stanford.edu/uda/
Typically, the majority of those who die as a result of the flu are the elderly, and children. Under normal circumstances, this leaves the majority of the working class intact, and any major economic impact is spared. However, the 1918 flu epidemic is unique in that the majority of those who died were of working ages, between 15 and 50. Also, males were disproportionately more likely to die due to flu-related causes. During this time period, men dominated the workforce.