Influenza A usually causes a high fever that lasts for several days.

Mar 09, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Under normal circumstances, "swine flu" refers to influenza A, and "high fever" means elevated body temperature. Patients with influenza A may experience a high fever lasting 3 to 5 days. In daily life, one should develop good personal hygiene habits, wash hands frequently with soap or hand wash and running water, and avoid using dirty towels to wipe hands. During peak flu season, it is advisable to avoid going to crowded places with poor air circulation as much as possible.

Generally, "Jia Liu" (甲流) refers to influenza A, and "Gao Shao" (高烧) means high fever. Patients with influenza A may experience a high fever lasting 3 to 5 days. Detailed analysis is as follows:

Influenza A is an acute respiratory infectious disease caused by the influenza A virus. After infection with influenza A virus, the virus triggers an immune response in the body, stimulating the production of inflammatory mediators and other substances, leading to fever. Most patients experience a rapid increase in body temperature within 1 to 2 days after onset, reaching 39°C or even higher. The high fever usually lasts for 3 to 5 days. Afterwards, as the immune system clears the virus, body temperature gradually decreases and returns to normal. However, if patients have underlying diseases, weakened immunity, or do not receive timely and effective treatment, the duration of high fever may be prolonged and may lead to severe complications such as pneumonia and respiratory failure, making the condition more complicated and severe.

In daily life, it is important to develop good personal hygiene habits, such as washing hands frequently with soap or hand soap and running water, and avoiding using dirty towels to wipe hands. During the high season of influenza, try to avoid going to crowded and poorly ventilated places. If necessary to go, it is recommended to wear a mask. When coughing or sneezing, cover the mouth and nose with tissues, towels, or other materials to prevent droplet transmission.

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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 are the differences between influenza and H1N1 flu?

In general, "influenza" is short for epidemic influenza, and "H1N1 flu" is one of the major types of influenza. The main differences between them lie in their scope, causative agents, transmissibility, symptom presentation, vaccine protection, and other aspects. It is important to practice personal protection in daily life, such as frequent handwashing, wearing masks, and avoiding crowded places. Maintain indoor ventilation, follow a regular作息 (daily routine), and strengthen immunity.

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Can an 11-month-old baby take oseltamivir phosphate granules?

In general, whether an 11-month-old infant can take oseltamivir phosphate granules depends on the specific circumstances. If the infant has been diagnosed with influenza A or B and is within 48 hours of symptom onset, administration under medical guidance may be necessary. However, if the infant does not have influenza or the optimal treatment window has passed, the medication is not needed and will likely have no significant effect.