Can getting a flu vaccine reduce the incidence of the common cold?

Sep 20, 2024 Source: Cainiu Health

Dr. Ren Yi

Introduction

The influenza vaccine is specifically developed based on the influenza virus. Vaccination stimulates the immune system to produce specific antibodies that prevent the replication and spread of the influenza virus in the body, thereby reducing the incidence of influenza. After vaccination, the immune system develops immunological memory against the influenza virus. If infected with the virus, the immune system can actively respond and reduce the severity of the illness.

In most cases, flu vaccination can generally reduce the incidence of influenza.

Flu vaccines are specifically developed based on influenza viruses. After vaccination, the immune system is prompted to produce specific antibodies that prevent the replication and spread of the influenza virus in the body, thereby reducing the occurrence of influenza.

After vaccination, the immune system develops immunological memory against the influenza virus. If infected with the virus, the immune system can actively respond, which helps alleviate the severity of flu symptoms and lower the risk of serious complications.

However, flu vaccines only target influenza viruses and cannot prevent colds caused by other pathogens. If the vaccine does not match the circulating virus strains, or if an individual has a weak immune response, the effectiveness of the vaccine may be reduced or even ineffective.

To comprehensively prevent influenza, in addition to receiving the flu vaccine, it is also important to maintain good personal hygiene habits, engage in regular physical exercise, ensure adequate sleep, and follow a balanced diet.

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When should children receive the influenza vaccine?

The appropriate age for children to receive the influenza A vaccine is 6 months and above. Children between 6 months and 3 years old can receive the vaccine every six months, and after 3 years of age, vaccination should be administered annually during flu season based on immune status. Before vaccination, ensure the child has no contraindications or allergies. After vaccination, regular observation is necessary, proper local care should be provided, and early exposure to water at the injection site should be avoided to prevent interference with recovery.

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What are inactivated vaccines?

In general, inactivated vaccines are prepared by killing pathogens using physical or chemical methods. Common types include inactivated SARS-CoV-2 vaccine, inactivated hepatitis A vaccine, inactivated poliovirus vaccine, inactivated rabies vaccine, and inactivated influenza vaccine. Before vaccination, individuals should truthfully report their health status, and after vaccination, they should monitor for local reactions.

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How long should one avoid exercise after receiving a vaccine?

Avoid strenuous exercise within 24 hours after receiving routine vaccines. For mRNA vaccines, avoid high-intensity exercise for one week; during this period, low-intensity activities such as walking are acceptable, and exercise intensity should be gradually increased. If chest pain, palpitations, or severe redness and swelling at the injection site occur after exercise, seek medical attention promptly. Routine vaccines include influenza vaccines.

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Can you still get influenza A after receiving the flu vaccine?

In general, influenza vaccine refers to a vaccine that prevents infection by the influenza virus. Whether one can still get H1N1 flu after receiving the influenza vaccine depends on specific circumstances following vaccination. If any discomfort occurs, prompt medical attention is recommended. Preventing H1N1 flu also requires attention to daily lifestyle habits. Keep indoor areas well-ventilated by opening windows regularly each day to reduce spaces where viruses can proliferate. Wear a mask when going outdoors.

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What are the active ingredients in vaccines?

Vaccine active ingredients include inactivated viruses, attenuated live viruses, recombinant proteins, polysaccharide substances, and viral vectors. Viruses are treated with chemical agents (such as formaldehyde) or physical methods (such as heating) to eliminate their infectivity while preserving their antigenic structure. After administration, they can stimulate the body to produce antibodies, preventing corresponding viral infections. This type is commonly found in influenza vaccines and inactivated poliovirus vaccines.

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Are there side effects of the flu vaccine?

In general, influenza vaccines may have side effects, but these are mostly mild and transient local or systemic reactions. Severe side effects are rare, and the overall safety profile is high. There is no need to refuse vaccination due to concerns about side effects. The risk of side effects from the flu vaccine is much lower than the health risks posed by influenza itself, and individuals who meet the vaccination criteria should prioritize getting vaccinated.

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Why should I avoid crowded places after receiving a flu vaccine?

Under normal circumstances, after receiving a flu vaccine, it is advisable to avoid crowded places. The main reasons include: the vaccine requires time to take effect, crowded places have a high density of viruses, there is a risk of virus transmission, cross-infection may occur, and visiting crowded places might worsen physical discomfort. To protect both your health and others', it is best to avoid crowded locations after receiving a flu vaccine.

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Do you need to get the flu vaccine every year once you start getting it?

Influenza viruses are highly variable, and the circulating influenza virus strains may differ from year to year. Therefore, even if you received the influenza vaccine the previous year, the antibodies produced may not effectively protect against the new influenza virus strains circulating in the following year. The influenza vaccine usually needs to be administered annually; however, individuals with allergies to the vaccine or certain immune system disorders may not require annual vaccination.

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