Essay --

Influenza or flu is caused by RNA viruses of the family orthomyxoviridae, that affects the nose, throat, and lungs- the respiratory system. The super acid signals are fever and respiratory problems, such as cough, sore throat,stuffy nose, as well as headaches and muscle aches. Influenza viruses are spread in the main by droplets made from people coughing, sneezing or talking bandage having the flu. These droplets stooge land in the mouths or noses of people or can inhaled into the lungs. It is least common for the virus to spread by touching an give surface then their mouth or nose. Flu viruses are split into 3 categories, A, B, C. A and B are responsible for problems in the respiratory system that typically occurs during the winter. Influenza types C is quite different from A and B. Type C only cause mild respiratory symptom or none at all. According to CDC, no one knows barely how many people die from the flu infection each year. thither are four main reasons for this. Fi rst of all, states are not infallible to report influenza related deaths that are older than the age of 18. Second, se...