How long can the influenza A virus survive?

Feb 05, 2025 Source: Cainiu Health

Dr. Ren Yi

Introduction

Under normal circumstances, "A flu" refers to influenza A. If the influenza A virus is outside the body, it can survive for 1-2 hours. If the influenza A virus is inside the body, it can typically survive for 1-10 days, depending on the individual's immunity. In daily life, it is recommended to actively consume other nutrients, maintain good living habits, and pay attention to one's physical and mental health.

Generally speaking, "swine flu" refers to influenza A. If the influenza A virus is outside the body, its survival time is usually 1-2 hours. If the influenza A virus is inside the body, it typically can survive for 1-10 days, depending on the individual's immunity. A detailed explanation is as follows:

If the influenza A virus exists outside the body, such as on object surfaces or in the air, its survival time is relatively short, generally only 1-3 hours. The exact duration largely depends on the environmental temperature and humidity. If the temperature is high or the air is dry, the survival time tends to be shorter, about 1-2 hours. If the temperature is lower and the air is more humid, the influenza A virus may survive for 2-3 hours.

However, if the influenza A virus is inside the body, such as in the host's saliva, it can usually survive for a longer period while maintaining strong infectivity, surviving mostly for 1-10 days. If the individual's immune system is strong and capable of eliminating the virus effectively, the survival time of the influenza A virus may be 1-5 days. If the immune system is weak and less capable of fighting the virus, its survival time may extend to 5-10 days before gradually being cleared by the body's immune defenses.

In daily life, it is advisable to actively consume other essential nutrients, maintain good living habits, and pay attention to personal physical and mental health.

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How many lines indicate a positive antigen test for influenza A?

Influenza A antigen refers to the antigen test for Influenza A virus. A positive result in the Influenza A antigen test will display two lines. In daily life, it is important to maintain personal hygiene, wash hands frequently with soap or hand wash, and thoroughly clean hands following the seven-step handwashing technique, especially after touching public items, before meals, and after using the toilet. Keep indoor air circulating by regularly opening windows for ventilation to reduce the risk of infection.

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Why has the cough persisted for almost a month after contracting influenza A, and what should be done?

Under normal circumstances, influenza A is a respiratory infectious disease caused by the influenza A virus. A cough persisting for nearly a month after influenza A may be caused by habitual coughing, the respiratory tract repair process, residual virus, bronchitis, pneumonia, or other reasons. Comprehensive treatment, including general care and medication under a doctor's guidance, may be utilized.

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Why does headache occur in the later stage of type A flu?

Influenza A is a respiratory infectious disease caused by Influenza A virus infection. It may be caused by factors such as insufficient sleep, dehydration, sinusitis, otitis media, or viral meningitis. If symptoms of Influenza A appear, timely medical consultation is necessary, and treatment should be conducted according to medical advice to prevent deterioration of the condition and the development of complications. Personal hygiene should also be emphasized in daily life, including frequent hand washing.

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Why do fingers and toes become cold during H1N1 influenza, and what should be done?

In general, influenza A is an acute respiratory infectious disease caused by the influenza A virus. Cold fingers and toes in cases of influenza A may be caused by temperature regulation response, constitutional factors, hypotension, electrolyte imbalance, viral myocarditis, or other reasons. Treatment may include general care and medication under a doctor's guidance. If discomfort occurs, prompt medical attention is recommended.