Influenza Epidemiology

Influenza Epidemiology - usually reserved for epidemic or...

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Influenza Epidemiology Larger populations tend to develop immunity over time, but the tendency for influenza viruses to mutate and swap genetic information produces new strains and outbreaks every year, usually during the winter months. The prevalence of a strain tends to peak two to three years after its emergence and multiple strains exist at any one given time. Influenza vaccines are usually derived from the two most epidemic strains of Influenza A and the current strain of Influenza B. Vaccines are now routinely given to at risk individuals including:- Those with chronic heart or lung disease Individuals who are immunosuppressed Patients over the age of 65 People living or working in high risk environments – teachers, doctors, nurses and care home staff Patients with diabetes and/or kidney disease. Diagnosis Diagnosis is usually made clinically taking into account a patient’s history and presentation. Whilst it is possible to identify the virus type from blood tests looking for serum antibodies and antigens this is
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Unformatted text preview: usually reserved for epidemic or pandemic episodes where virulence and mortality are high. Prognosis Influenza's effects are much more severe and last longer than those of the common cold. Most people will recover completely in about one to two weeks, but others will develop life-threatening complications (listed above). Influenza can be deadly, especially in the young old, or chronically ill. People who are immunosuppressed, such as people with advanced HIV infection or transplant patients (whose immune systems are medically suppressed to prevent transplant organ rejection), suffer from particularly severe disease. Other high-risk groups include pregnant women and young children. Prevention Influenza can be primarily prevented by ensuring contact with infected individuals is kept to a minimum, coughs and sneezes are covered and hands are washed regularly. Vaccination can help prevent susceptible individuals from picking up the influenza virus....
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Influenza Epidemiology - usually reserved for epidemic or...

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