What is the incubation period of the H1N1 (swine) flu? How long will it take to get the flu after being exposed?
The estimated incubation period is unknown and could range from 1 to 7 days, and more likely 1 to 4 days.
Persons with novel H1N1 flu virus infection should be considered potentially contagious (able to spread disease) for up to 7 days after illness onset. Persons who continue to be ill longer than 7 days should be considered potentially contagious until symptoms have resolved. Children, especially younger children, might be contagious for longer periods. People with influenza-like illness should stay home for at least 24 hours after their fever is gone (without the use of fever-reducing medicine). A fever is defined as having a temperature of 100 degrees Fahrenheit or 37.8 degrees Celsius or greater.
It's important to remember that we are still in flu and allergy season and it's not uncommon to have cold or flu-like symptoms. If you are sick, stay home from work or school to monitor your health. If you do have symptoms where you think you need urgent care, contact your doctor right away.
Last Reviewed: 09/21/2009
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