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Influenza

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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,

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