The standard deviation is a measure of how the data is clustered about the mean. For large sets of data, approximately 68.3% of the data lies within one standard deviation of the mean and approximately 95.4% of the data lies within two standard deviations of the mean.
Influenza (also known as the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccination each year.
Influenza can cause different illness patterns, ranging from mild common cold symptoms, to typical flu, to life-threatening pneumonia, bacterial infections and other complications. There are a number of drugs approved by FDA for the treatment and prevention of influenza.Vaccination is the primary means of preventing and controlling influenza. Antibiotics are used to treat illnesses caused by bacteria.nfluenza can cause different illness patterns, ranging from mild common cold symptoms, to typical flu, to life-threatening pneumonia, bacterial infections and other complications. There are a number of drugs approved by FDA for the treatment and prevention of influenza.