How to Determine if You Have Contracted Influenza A

Jan 21, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Influenza A refers to Type A influenza. Under normal circumstances, Type A influenza can be diagnosed through observation of symptoms, contact history assessment, antigen testing, nucleic acid testing, and routine blood tests. It is recommended to maintain good personal hygiene habits in daily life, such as frequent hand washing and ensuring proper indoor ventilation. Avoiding crowded places as much as possible can help prevent Type A influenza.

　　Influenza A refers to Influenza Type A. Generally, Influenza A can be identified through observation of symptoms, contact history evaluation, antigen testing, nucleic acid testing, and routine blood tests. Detailed explanations are as follows:

　　1. Observation of symptoms: Influenza A typically causes high fever, with body temperature reaching 39–40°C, or even higher. Meanwhile, patients may experience body aches, headache, and severe coughing.

　　2. Contact history evaluation: If someone has had close contact with a confirmed or suspected Influenza A patient, such as being in the same classroom or sharing dining utensils or daily necessities, they may likely be infected.

　　3. Antigen testing: Antigen testing identifies infection by detecting specific antigen components on the virus surface. This method is relatively fast. If the test kit displays a positive result, it is highly likely that the person has contracted Influenza A.

　　4. Nucleic acid testing: Nucleic acid testing confirms infection by detecting the nucleic acid of the Influenza A virus. The testing process is relatively complex and involves multiple steps, including sample collection, transportation, and laboratory processing. If the nucleic acid test result is positive, the person can be definitively diagnosed with Influenza A.

　　5. Routine blood test: The Influenza A virus mainly infects respiratory cells in the human body. After infection with the Influenza A virus, a routine blood test may show normal or reduced total white blood cell count, with a relatively increased proportion of lymphocytes.

　　It is recommended to maintain good personal hygiene habits in daily life, such as frequent hand washing and ensuring indoor ventilation. During peak seasons for influenza, it is advisable to avoid crowded places as much as possible to help prevent Influenza A.

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Is dizziness after influenza A a sign of recovery?

Under normal circumstances, "Jia Liu" refers to Influenza A H1N1. Whether dizziness following Influenza A H1N1 indicates recovery depends on the specific circumstances. If dizziness is the only symptom present without other accompanying symptoms, it usually suggests the condition is improving. However, if dizziness is accompanied by other systemic symptoms such as headache, tinnitus, or fatigue, it may not indicate improvement. If any discomfort persists, prompt medical attention is recommended.

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What does a high level of amyloid A protein indicate?

Infection is a common cause of elevated marker levels. During bacterial infections such as pneumonia and pyelonephritis, serum amyloid A protein rapidly increases within hours, and the extent of elevation often correlates with the severity of the infection. Viral infections, such as influenza and coronavirus infection, can also lead to increased levels, although the rise is typically less pronounced than in bacterial infections, making it a useful adjunct for differentiating types of infection.