The symptoms of
influenza (flu) appear suddenly and often
100°F (37.8°C) to
104°F (40°C), which can reach
106°F (41°C) when symptoms
first develop. Fever is usually continuous, but it may come and go. Fever may
be lower in older adults than in children and younger adults. When fever is
high, other symptoms usually are more severe.
Body aches and muscle
pain (often severe), commonly in the back, arms, or
Pain when you move your
Fatigue, a general feeling of sickness (malaise), and loss of
A dry cough, runny nose, and dry or sore throat. You may
not notice these during the first few days of the illness when other symptoms
are more severe. As your fever goes away, these symptoms may become more
Influenza usually does not cause symptoms in the stomach or
intestines, such as vomiting and diarrhea.
What is it about swine flu that has people so nervous? Should seniors in particular be worried? To learn more, WebMD went to medical experts and got their answers to these and other questions about the 2009 H1N1 virus.