1. The beginning of the disease.
Usually the flu starts sharply and the persons may even say an hour when they got sick.
SARS starts gradually, growing with every day that passes.
Influenza: it may up to 39-40 C and above in a few hours, holds at least 3 days.
SARS: not rises much, usually below 38.5 C, it may take a day or two to go away.
3. General feelings.
The flu: the whole body aches, chills, sweating, pain in the temples, pain in the eyes when you try to move them, photophobia.
SARS: fatigue, but without pronounced pain.
4. Running nose.
The flu: typically does not happen. If appears, then on the second day of illness. Occasionally – sneezing. Often conjunctivitis.
SARS: nose is stuffed up, the feeling of swelling. A bad cold. Frequent sneezing. Eyes are watered, but conjunctivitis usually does not happen.
The flu: red and swollen rear wall of the pharynx and soft palate. On the second day there is a painful cough, chest pain. The cough can turn into bronchitis and last two to three weeks.
SARS: the red and loose all the time during the disease. Cough is dry and hacking.
6. Digestive tract.
Flu often may be accompanied by vomiting and diarrhea, especially if you get virus H1N1, which will circulate this season.
SARS: Diarrhea and vomiting are rare.
7. The illness time.
The flu: fever is up for 4 days, the disease usually continues for 10 days. But once the temperature goes down, for 2-3 weeks can not pass, insomnia, headache, weakness, irritability and fatigue.
SARS: the symptoms stay for about 7 days. Asthenic syndrome (fatigue and weakness), after an illness not.