Q&A : Answering Common Questions About the Influenza Vaccine
Health News
07 Jun 2025
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Q&A : Answering Common Questions About the Influenza Vaccine
Influenza often spreads during the rainy and winter seasons, causing illness with symptoms such as fever, cough, sneezing, runny or congested nose, body aches, and fatigue. While these may not sound too severe, for those with weak immune systems, chronic illnesses, young children, or the elderly, the flu can lead to life-threatening complications. To help those considering the influenza vaccine feel more confident.
Here are some FAQs answered by Phitsanulok Hospital :
- Q : Why do I need a flu shot every year?
- A : Influenza viruses constantly change, and new strains can emerge in both animals and humans. Our immunity to the flu virus declines within 6 months to 1 year, so annual vaccination is necessary.
- Q : How long does it take for immunity to build after the flu shot?
- A : It takes about 2–3 weeks for your body to develop immunity after the shot.

- Q : Will I be 100% protected from the flu after vaccination?
- A : The vaccine is about 80% effective. While you might still get the flu, the symptoms are likely to be milder and less severe.
- Q : Can I get the flu shot before or after a COVID-19 vaccine?
- A : Yes. You can get both vaccines on the same day (preferably in different arms), as they protect against different viruses. It’s recommended to receive both.

Getting the Flu Vaccine is one of the best ways to protect your body, reduce the severity of the illness, and avoid costly hospital treatments. Phitsanulok Hospital now offers the 4-strain flu vaccine, covering both type A and B strains — suitable for both children and adults.

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