How long does it take to recover from the flu?

Written by Yuan Qing

Pulmonology

Updated on June 13, 2025

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Influenza, also known as the flu, is usually a respiratory disease caused by influenza virus infections in humans. It is characterized by being self-limiting, which means that patients can improve without treatment. The flu is no exception; it tends to be self-limiting but only in people with normal immune function. Typically, patients can recover on their own in about 7-10 days. However, for some specific populations like the elderly, children, pregnant women, or those with underlying diseases, the duration of the flu may be extended and may lead to severe complications.

Other Voices

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Written by An Yong Peng

Pulmonology

54sec

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What to do if you are afraid of cold with type A influenza?

Patients with Type A influenza who are sensitive to cold often need to pay attention to appropriate warmth. Additionally, monitoring the patient's temperature is necessary, and if the patient has a fever, it is often necessary to use antipyretic medications to control their temperature and alleviate symptoms of chilliness and cold sensitivity. For Type A influenza, it is generally recommended to start antiviral treatment with a neuraminidase inhibitor orally within 48 hours of onset. Antiviral treatment can help shorten the duration of illness and reduce the complications related to Type A influenza. Moreover, in cases of Type A influenza where the patient is sensitive to cold, it is also important to pay attention to a light diet and proper hydration. Avoiding staying up late and excessive physical exertion are non-pharmacological measures that also help with the condition.

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Written by Yuan Qing

Pulmonology

56sec

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How many days will the flu get better?

Influenza refers to a series of diseases characterized mainly by sore throat, cough, and fever, which occur after the respiratory tract of humans is infected by the influenza virus. We call it influenza, or epidemic flu, which is generally caused by a viral infection and is a self-limiting disease. Usually, it can naturally improve within 7-10 days. Of course, this refers to people with normal immunity, such as young people or those who generally have good physical health. However, elderly and children might experience a prolonged illness, which could extend to 10-15 days, and may even lead to related complications due to influenza, such as influenza meningitis, influenza pneumonia, or even influenza myocarditis. Therefore, special attention should be given to vulnerable groups, including the elderly, children, and pregnant women.

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Written by Yuan Qing

Pulmonology

50sec

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Do you need to isolate for the flu?

Influenza can be classified into three types based on the surface membrane proteins and nucleocapsids: type A, type B, and type C. Type A influenza usually causes major outbreaks in populations. Due to frequent genotypic changes in type A influenza, the general population often lacks immunity against it. Generally, influenza is a legally designated class B infectious disease in the country, and it can be transmitted to normal or healthy individuals through droplets, sneezing, or aerosols. Therefore, if an outbreak occurs, isolation measures should be taken, people should avoid crowded public places as much as possible, and maintain ventilation by keeping windows open, to prevent transmission from infected patients or certain animals.

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Written by Yuan Qing

Pulmonology

50sec

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Routes of influenza transmission

Influenza, also known as the flu, is a disease caused by infection of the upper respiratory tract with the influenza virus. It is characterized mainly by sore throat, cough, and fever, and some patients may also experience nausea, vomiting, and diarrhea. The primary mode of transmission of influenza is through droplets, which occur when an infected person sneezes or coughs, and their secretions, such as nasal discharge, are inhaled by others. Additionally, the virus can be transmitted through the digestive tract and mucous membranes of the skin. If a healthy person comes into contact with the secretions of an infected person, such as through skin contact or orally, they may also be infected. Therefore, it is crucial to isolate from those infected with the flu.

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Written by Yuan Qing

Pulmonology

52sec

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What should I do if the flu recurs with fever?

Influenza, also known as the flu, refers to a disease characterized primarily by sore throat, cough, and fever, caused by an influenza virus infection of the upper respiratory tract during the flu season. Due to the repeated replication of the influenza virus after entering the human body, it triggers an immune response between the person and the virus, thus causing repeated fevers. However, for a person with normal immunity, the flu can improve on its own, usually over 7 to 10 days. During these 7 to 10 days, if the fever recurs, it can be managed with some antipyretic medicines. Both traditional Chinese medicine and Western medicine have relevant drugs. After the fever subsides, the flu can usually heal on its own within about 3 to 5 days. (Please use medication under the guidance of a doctor.)