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Can vaccination prevent swine flu pneumonia?

Mar 17, 2025 Source: Cainiu Health
Dr. Ren Yi
Introduction
Influenza A refers to Influenza A virus infection. Vaccination can help prevent pneumonia that may be caused by Influenza A to some extent. Before receiving the influenza vaccine, you should truthfully inform the doctor about your health status, including any history of allergies or underlying medical conditions, so the doctor can determine whether vaccination is appropriate for you. After vaccination, you should remain at the vaccination site for 30 minutes of observation to guard against possible adverse reactions such as allergic responses.

Generally speaking, "Avian Flu" refers to Influenza A. Vaccination can help prevent pneumonia that may be caused by Influenza A to some extent. A detailed explanation is as follows:

　　

Vaccines targeting the Influenza A virus are an effective method for preventing Influenza A. Vaccines stimulate the human immune system to produce antibodies specific to the Influenza A virus, thereby enabling rapid identification and elimination of the virus upon invasion, reducing the risk of infection. Because influenza viruses are highly variable, the predominant viral strains may differ each year. Therefore, influenza vaccines are updated annually based on predicted prevalent strains to ensure their effectiveness.

Prior to receiving the influenza vaccine, individuals should truthfully inform their doctor about their health status, including any history of allergies or underlying medical conditions, so that the doctor can determine whether vaccination is appropriate. After vaccination, individuals should remain at the vaccination site for 30 minutes of observation to guard against possible adverse reactions such as allergic responses. Some people may experience mild discomfort after vaccination, such as pain, redness, or swelling at the injection site, or low-grade fever and fatigue. These symptoms generally do not require special treatment and will resolve on their own within 1–2 days.

However, it is important to note that vaccination does not guarantee 100% protection against Influenza A infection. Therefore, it is still necessary to maintain everyday preventive measures, such as frequent handwashing, maintaining social distancing, and avoiding crowded places to reduce the risk of viral infection. If you have concerns or develop symptoms, seek medical advice promptly.

References:

[1] Huang Fei. During Flu Season, Certain Groups Need to Be Especially Cautious [N]. Qingdao Daily, January 21, 2025 (008).

[2] Chen Qiong, Yu Qiao. Protecting the Elderly with Vaccines: Keeping Away Influenza and Pneumonia [J]. Health Care and Medical Journal, 2024, (11):13-15.

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