How to Determine if You Have Contracted Influenza A
Disease description:
I am 20 years old. Recently, due to unpredictable weather changes, I have developed symptoms including cough, sore throat, and fever, with a body temperature as high as 39°C. Additionally, I am experiencing generalized muscle pain and feel extremely fatigued. I am worried that I might have contracted the influenza A virus. How can I determine whether I have contracted influenza A?
Doctor's answer (1)
Dr. Ren Yi
Generally speaking, "swine flu" refers to influenza A, which is an acute respiratory infectious disease caused by the influenza A virus and is highly contagious. The main symptoms of influenza A include high fever, usually exceeding 38.5°C, cough, sore throat, nasal congestion or runny nose, body aches, headache, fatigue, and sometimes nausea and vomiting. Symptoms such as cough, sore throat, and fever are consistent with those of influenza A, but these symptoms may also be indicative of other respiratory diseases; therefore, further tests are needed to confirm the diagnosis.
Diagnosis can be made by collecting respiratory secretions for testing. If the test result is positive, it indicates the patient has been infected with influenza A virus. Additionally, a blood sample can be taken from a vein to test for the specific neutralizing antibody levels against influenza A virus in paired serum samples. If the antibody level rises to four times or more than the normal level, it confirms that the patient has been infected with the influenza A virus. Antigen testing can also be performed. If the antigen test result is positive, it is highly likely that the patient has been infected with the influenza A virus.
If influenza A infection is suspected, one should seek medical attention at a hospital immediately. During the waiting period for diagnosis, self-isolation is recommended to avoid close contact with others and reduce the risk of transmission. During the illness, adequate rest and sufficient fluid intake are beneficial for recovery.
