The flu is caused by one of three types of influenza viruses. Types A and B have the effect of the yearly flu epidemics, and type C triggers sporadic illness. Type A is further divided into different subtypes in line with the chemical structure of the virus.
Influenza is highly contagious. The virus is spread when an individual either inhales infected droplets in the air (coughed up or sneezed by an infected person) or when somebody comes in direct connection with an infected individuals secretions (for example, kissing, sharing of handkerchiefs along with other items, and through use of objects such as spoons and forks).
In younger kids, the pattern of influenza may be a typical influenza-like illness or seem like other respiratory system infections such as croup, bronchitis, or pneumonia. Abdominal pain, vomiting, and diarrhea are often observed in children. Vomiting tends to be higher than diarrhea. Fever is usually high and irritability might be prominent.
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