Vaccination Information Leaflet
Influenza vaccines help to prevent influenza (also known as flu), a common infection caused by Influenza virus types A and B.
It takes at least 2 weeks for protection to develop after vaccination.
Flu symptoms include fever, chills, headache, feeling tired, muscle aches, sore throat and cough.
According to the National Adult Immunisation Schedule (NAIS) and National Childhood Immunisation Schedule (NCIS).The flu jab or flu shot is recommended for everyone and especially in people who are at high risk of developing influenza complications such as:
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Inform your healthcare professional if:
The flu vaccine or flu shot is either given by injection into a muscle or just underneath the skin.
One dose is recommended per year as flu viruses are constantly changing, and your body’s immunity to influenza viruses may decrease over time.
Severe allergic reactions (anaphylaxis) are rare and can happen within minutes to a few hours after vaccination.
The symptoms of a severe allergic reaction include one or more of the following:
If you experience any of these symptoms, you should inform your healthcare professional immediately.
Disclaimers
Please take note that the above is not a complete list of all possible side effects. If you have any concerns about your medication or if you have other side effects that you think are caused by this medication, please consult your doctor or pharmacist.
If you take more than the recommended dose, please seek medical advice immediately. The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information.
This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (National Healthcare Group, National University Health System and SingHealth), community pharmacies (Guardian, Unity and Watsons) and Pharmaceutical Society of Singapore. The content does not reflect drug availability and supply information in pharmacies and healthcare institutions. You are advised to check with the respective institutions for such information.
Last updated in December 2022
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This article was last reviewed on Wednesday, April 03, 2024