Influenza, commonly called "the flu," is caused by viruses that infect the respiratory tract.
Compared with most other viral respiratory infections, such as the common cold, influenza
infection often causes a more severe illness. Typical clinical features of influenza include fever,
cough, sore throat and respiratory symptoms.
Influenza viruses are categorized into 3 different viruses, A, B, and C. The A and B influenza
viruses are responsible for the epidemic form of respiratory illness that occurs almost every
winter. These 2 forms are often associated with increased rates for hospitalization and death.
Influenza type C is different from A and B. Type C infection is usually very mild respiratory
illness or no symptoms at
…show more content…
The older antibody can, however, provide partial protection against reinfection.
Currently, three different influenza strains circulate worldwide: two type A viruses and one type
B. Type A viruses are divided into subtypes based on differences in two viral proteins called the
hemagglutinin (H) and the neuraminidase (N). The current subtypes of influenza
The impact of influenza on human society in Australia was marked as an pandemic beacause it
has been estimated that in 1918 to 1919 Spanish influenza pandemic 2 million of Australia's
population of 5 million were infected and 15,000 died and possibly as many as two million
Australians were infected. The 1920 Official year book of the Commonwealth of Australia put
forward a figure of just under 12,000 deaths, but that is almost certainly an underestimate by at
least 3000 to 4000. More than 5000 marriages were affected by the loss of a partner and over
5000 children lost one or both parents.
In 1919, almost 40% of Sydney’s population had infl uenza, more than 4000 people died, and
…show more content…
Business models of economic growth offer conflicting predictions of whether the influenza
epidemic, and the accompanying negative shock to population and the labor force, did increase
or decrease the rate of growth over the medium and long run. The first difficulty was accurately
modeling the nature of such a shock. There was certainly a large negative shock to the
population and the labor force in 1918 and 1919, but there is strong reason to believe that this
shock affected population and labor force growth rates substantially beyond these two years.
Since a large proportion of the deaths occurred among those aged 15 to 44, the epidemic
undoubtedly adversely affected family formation and fertility for years after the epidemic.
However, data limitations make it difficult to precisely estimate this effect.
The conventional view of the effect of the influenza is that it sharply reduced the size of the
working population, leading to a rapid increase in real wages for the laboring classes that could
still perform the required duties. The impact on per capita income was less clear, however,
This influenza occurred at the latter point of “World War 1” coming at a vulnerable time for the world. Many people have already died due to the war, and many resources and money has already been consumed. So when the pandemic hit, it hit with a charge that left a great wound in the economy and health of the people not just in the U.S. but the world. People responded by taking more precautions in health and safety, and took radical response in the exterminating of animal populations.
Influenza, also known as the flu, is a contagious respiratory illness caused by the influenza virus that infects the nose, throat, and lungs (Centers for Disease Control and Prevention,
Although Type A viruses undergo both types of changes, Type B only go through the more gradual Type B.
Infectious epidemics and pandemics have happened all through mankind's history. “They remain the prime cause of death worldwide and will not be conquered during our lifetimes.” The flu of 1918 was one of the deadliest epidemics in history. “It infected an estimated 500 million people worldwide–about one-third of the planet’s population at the time–and killed an estimated 20 million to 50 million victims. More than 25 percent of the U.S. population became sick, and some 675,000 Americans died during the pandemic.” No one knew how the virus spread, there were no antibiotics to fight it, and no flu shots to prevent it. In the final year of World War I, it struck terror in the hearts of people all across Europe and left more death in its wake than the combined military actions of the combatants. “It killed more Americans in a few months than World War I, World War II, the Korean War, and the
Influenza was one of the very common disease seen in war. it was the pandemic 1918- 1919, this year was put down as one of the global disasters. Influenza is a very contagious viral infection respiratory passages causing fever, the effects of this disease are a cough ,sore throat, runny or stuffy nose, muscle or body aches, headaches, always very
The book The Great Influenza by John Barry takes us back to arguably one of the greatest medical disasters in human history, the book focuses on the influenza pandemic which took place in the year 1918. The world was at war in the First World War and with everyone preoccupied with happenings in Europe and winning the war, the influenza pandemic struck when the human race was least ready and most distracted by happenings all over the world. In total the influenza pandemic killed over a hundred million people on a global scale, clearly more than most of the deadliest diseases in modern times. John Barry leaves little to imagination in his book as he gives a vivid description of the influenza pandemic of 1918 and exactly how this pandemic affected the human race. The book clearly outlines the human activities that more or less handed the human race to the influenza on a silver platter. “There was a war on, a war we had to win” (Barry, p.337). An element of focus in the book is the political happenings back at the time not only in the United States of America but also all over the world and how politicians playing politics set the way for perhaps the greatest pandemic in human history to massacre millions of people. The book also takes an evaluator look at the available medical installations and technological proficiencies and how the influenza pandemic has affected medicine all over the world.
Most influenza outbreaks disproportionately kill juvenile, elderly, or already weakened patients; in contrast the 1918 pandemic predominantly killed previously healthy young adults. Modern research, using virus taken from the bodies of frozen victims, has concluded that the virus kills through a cytokine
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
This research paper covers the basic history of influenza. It begins with its early history
Avian influenza is a disease that has been wreaking havoc on human populations since the 16th century. With the recent outbreak in 1997 of a new H5N1 avian flu subtype, the world has begun preparing for a pandemic by looking upon its past affects. In the 20th Century, the world witnessed three pandemics in the years of 1918, 1957, and 1968. In 1918 no vaccine, antibiotic, or clear recognition of the disease was known. Killing over 40 million in less than a year, the H1N1 strain ingrained a deep and lasting fear of the virus throughout the world. Though 1957 and 1968 brought on milder pandemics, they still killed an estimated 3 million people and presented a new
According to Center for Disease Control (CDC), influenza viruses are divided into three types, designated as A, B, and C. Influenza type C usually only causes either very mild symptoms or no symptoms at all. Types A and B, however, are responsible for epidemics of respiratory illnesses that can result in hospitalization, or even death. Influenza is constantly changing over time by mutations. This continual change allows the virus to evade the antibodies that were meant to kill it. A host infected with influenza virus develops antibodies against that virus; as the virus changes, the "first" antibody no longer recognizes the "newer" virus and infection can occur because the host does not recognize the new flu virus as a problem until the infection is well under way. The first antibody developed may, in some instances, provide partial protection against infection with a new influenza virus. According to Medicine Net.com, In 2009, almost all individuals had no antibodies that could recognize the novel H1N1 virus immediately. It quickly spread throughout the world so fast that the WHO declared this new flu strain (termed novel H1N1 influenza A swine flu). There are currently four main strains of influenza circulating worldwide. Three of the viruses are type A, and one is type B. Type A viruses are divided into subtypes based on the differences in two viral proteins called hemagglutinin (H) and neuraminidase (N). The three subtypes of influenza A are A(H1N1), A(H3N2), and A(H5N1). The reason for several strands of type A are because of the two kinds of change influenza A
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.
In two years between 1918 and 1919, A pandemic of influenza swept mercilessly over the planet, killing millions which stood in its path. Miraculously, the exact origin of the pandemic is unclear. What is exceedingly clear, however, is that often the actions of man aided in the spread of the virus, whether due to inadvertent endangerment, close quarters, religious principles, or failure to recognize the true threat that influenza posed.
Influenza, normally called “the flu”, the influenza virus causes an infection in the respiration tract. Even though the influenza virus can sometimes be compared with the common cold. It also can cause a more severe illness or death. During this past century, pandemics took place in 1918, 1957, and 1968, in all of these cases there where unfortunately many deaths. The “Spanish flu” in 1918, killed approximately half a million people in the United States alone. It killed around 20 million worldwide. The “Asian flu” in 1957, in the United States their 70,000 people died. In 1968 the “Hong-Kong flu” There where 34,000 deaths in the United
There are three types of the influenza virus: Type A, B, and C. Types A and B are contracted and spread by human-to-human transmission.