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Buying Louis Vuitton Women Handbags Top Handles Top Handles Infinity M92147 sales t9J36640

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Influenza Seasonal Seasonal influenza is an acute viral infection that spreads easily from person to person.

Seasonal influenza viruses circulate worldwide and can affect people in any age group. In temperate climates, seasonal epidemics occur mainly during winter while in tropical regions, influenza seasonality is less obvious and epidemics can occur throughout the year. Seasonal influenza is a serious public health problem that causes severe illness and death in high risk populations. An influenza epidemic can take an economic toll through lost workforce productivity and strained health services. Influenza vaccination is the most effective way to prevent disease. Antiviral drugs are available for treatment, though influenza viruses can develop resistance to the drugs. There are 3 types of seasonal influenza viruses, types A, B, and C. Influenza type A viruses are further classified into subtypes according to the combinations of 2 different proteins, the haemagglutinin (H) and the neuraminidase (N), located on the surface of the virus. The subtypes of influenza A viruses currently circulating among humans are influenza A(H1N1) and A(H3N2) subtypes. The circulating influenza A(H1N1) is also written as A(H1N1)pdm09 as it caused the pandemic in 2009 and subsequently replaced the seasonal influenza A(H1N1) virus which had circulated prior to 2009. Only influenza type A viruses are known to have caused pandemics. Circulating influenza B viruses can be divided into 2 main groups (lineages), referred to as B/Yamagata and B/Victoria lineages. Influenza B viruses are not classified into subtypes. Influenza A and B viruses circulate and cause outbreaks and epidemics. Due to this reason, relevant strains of influenza A and B viruses are included in seasonal influenza vaccines. Influenza type C virus is detected much less frequently and usually causes mild infections, thus presents less significant public health implications. Seasonal influenza is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose. The cough can be severe and can last 2 louis vuitton mens bracelet or more weeks. Most people recover from fever and other symptoms within a week without requiring medical attention. But influenza can cause severe illness or death especially in people at high risk (see below). The time from infection to illness, known as the incubation period, is about 2 days. Seasonal influenza spreads easily, with rapid transmission in crowded areas including schools and nursing homes. When an infected person coughs or sneezes, droplets containing viruses (infectious droplets) are dispersed into the air and are spread to persons in close proximity who breathe these droplets in. The virus can also be spread by hands contaminated with influenza viruses. To prevent transmission, people should cover their mouth and nose with a tissue when coughing, and wash their hands regularly. Seasonal epidemics and disease burden In temperate climates, seasonal epidemics occur mainly during winter, while in tropical regions, influenza may occur throughout the year, causing outbreaks more irregularly. Illnesses range from mild to severe and even death. Hospitalization and death occur mainly among high risk groups. Worldwide, these annual epidemics are estimated to result in louis vuitton mens shoes size 12 about 3 to 5 million cases of severe illness, and about 250 000 to 500 000 deaths. In industrialized countries most deaths associated with influenza occur among people age 65 or older (1). Epidemics can result in high levels of worker/school absenteeism and productivity losses. Clinics and hospitals can be overwhelmed during peak illness periods. The effects of seasonal influenza epidemics in developing countries are not fully known, but research estimates indicate that 99% of deaths in children under 5 years of age with louis vuitton purses with zippers influenza related lower respiratory tract infections are found in developing countries (2). The most effective way to prevent the disease is vaccination. Safe and effective vaccines are available and have been used for more than 60 years. Among healthy adults, influenza vaccine provides protection, even when circulating viruses may not exactly match the vaccine viruses. However, among the elderly, influenza vaccination may be less effective in preventing illness but reduces severity of disease and incidence of complications and deaths. Vaccination is especially important for people at higher risk of serious influenza complications, and for people who live with, or care for, high risk individuals. WHO recommends annual vaccination for: pregnant women at any stage of pregnancy children aged between 6 months to 5 years elderly individuals (aged more than 65 years) individuals with chronic medical conditionsInfluenza vaccine is most effective when circulating viruses are well matched with viruses contained in vaccines. Due to the constant evolving nature of influenza viruses, the WHO Global Influenza Surveillance and Response System (GISRS) a network of National Influenza Centres and WHO Collaborating Centres around the world continuously monitors the influenza viruses circulating in humans and updates the composition of influenza vaccines twice a year. For many years, WHO has updated its recommendation on the composition of the vaccine that targets the 3 (trivalent) most representative virus types in circulation (two subtypes of influenza A viruses and one influenza B virus). Starting with the 2013 2014 northern hemisphere influenza season, a 4th component is recommended to support quadrivalent vaccine development. Quadrivalent vaccines include a 2nd influenza B virus in addition to the viruses in trivalent vaccines, and are expected to provide wider protection against influenza B virus infections. A number refills for louis vuitton small agenda of inactivated influenza vaccines and recombinant influenza vaccines are available in injectable form. Live attenuated influenza vaccine is available as a nasal spray.

Antiviral drugs for influenza are available in some countries and may reduce severe complications and deaths. Ideally they need to be administered early (within 48 hours of onset of symptoms) in the disease. There are 2 classes of such medicines:.


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