America's North Shore Journal

The symptoms of swine flu are very similar to those of seasonal flu. The different strains of influenza seem to affect people in pretty much the same ways.

The first key symptom is a high fever. The fever may be mild but can also rapidly increase to a dangerous temperature. In an adult, an oral temperature over 100 degrees F is considered a fever, and in children a rectal temperature over 100.4 degrees F. Fevers over 103 degrees begin to be dangerous. A spiking fever, rapid onset and rapid increase to a high temperature, is also a sign of danger. Headache and chills may accompany the fever. CDC WebMD Mayo Clinic

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