Is Flu Vaccination Necessary Every Year?
Is Flu Vaccination Necessary Every Year?
Flu vaccination refers to the annual immunisation designed to protect against circulating influenza virus strains. In Singapore, influenza circulates year-round with periodic peaks, leading many individuals to question whether yearly vaccination is required. This is particularly relevant for older adults, individuals with chronic medical conditions, healthcare workers, and parents of young children. Because influenza viruses change over time and immunity can decline, vaccination recommendations are reviewed annually. This article explains when yearly flu vaccination is recommended, who benefits most, and what to consider when making a decision.
What is included in Flu Vaccination?
In Singapore, seasonal influenza vaccines typically protect against:
- Two influenza A strains (commonly H1N1 and H3N2)
- One or two influenza B strains (depending on vaccine type)
- Single-dose intramuscular injection
- Pre-vaccination assessment by a doctor or nurse
Both trivalent and quadrivalent formulations may be available depending on supply and recommendations.
Who Should Consider Flu Vaccination?
Annual flu vaccination is generally recommended for:
- Adults aged 65 years and above
- Children aged 6 months and older
- Pregnant women
- Individuals with chronic conditions (e.g. asthma, diabetes, heart disease)
- Immunocompromised individuals
- Healthcare workers and caregivers
- Residents of nursing homes or long-term care facilities
- Individuals who travel frequently
In Singapore, influenza risk persists throughout the year, making timing of vaccination flexible.
Who May Not Need It?
Some individuals may not require annual vaccination:
- Healthy adults with low exposure risk
- Individuals who have already received the current season’s flu vaccine
- Those with severe allergy to a previous flu vaccine component (requires medical review)
However, even low-risk individuals may choose vaccination for preventive purposes or household protection.
Definition: Influenza (Flu) Vaccination
Influenza vaccination is an annual immunisation that protects against selected strains of the influenza virus predicted to circulate during the upcoming season. The vaccine stimulates the immune system to produce protective antibodies. It does not treat active influenza infection but reduces the risk of catching the infection in the first place and its related complications.
Benefits of Flu Vaccination
Potential benefits include:
- Reduced risk of influenza infection
- Lower risk of hospitalisation in vulnerable groups
- Reduced severity of illness if infection occurs
- Protection of high-risk household members
- Reduced workplace or school disruption
Vaccination contributes to community-level protection, particularly in healthcare and eldercare settings.
Limitations and Risks
Flu vaccination has limitations:
- Effectiveness varies depending on strain match
- Protection decreases over time
- Does not protect against non-influenza respiratory viruses
- Does not treat active influenza infection
Possible side effects:
- Mild injection site pain or swelling
- Low-grade fever or fatigue
- Rare allergic reactions
What Happens During the Appointment?
- Registration – Personal and medical details are confirmed.
- Medical Consultation – Medical practitioner reviews medical history, allergies, suitability, and counsels on common side effects.
- Vaccination – Injection administered into the upper arm. The full visit usually takes 15 to 30 minutes.
How Much Does It Cost in Singapore?
In Singapore, flu vaccination typically costs:
- $30 to $50 per dose in private clinics. It is $32 inclusive of GST at Minmed Clinics.
- Subsidies may apply under CHAS for eligible individuals
Frequently Asked Questions
Do I need fasting before flu vaccination?
No fasting is required. You may eat and drink normally before the appointment unless advised otherwise.
Is flu vaccination safe?
Flu vaccines are generally well tolerated. Mild side effects such as arm soreness or low-grade fever may occur. Serious allergic reactions are rare but require immediate medical attention.
Can I get the flu from the vaccine?
No. The injectable influenza vaccine does not contain live virus capable of causing influenza infection..
Is it suitable for younger adults?
Healthy younger adults may choose vaccination, especially if they live with vulnerable individuals or work in high-exposure environments.
Can pregnant women receive flu vaccination?
Yes. Influenza vaccination is generally considered safe during pregnancy and may provide passive protection to the newborn. Individual assessment is recommended.
If you are considering flu vaccination, services are available at Minmed Clinics. Speak to our doctors to understand which option is suitable for you and your family.
🔗 Find out more about flu vaccination services
Medical Review & Authorship
This page is medically reviewed by:
Dr Yap Jun Jie Julian
MBBS, GDFM
Minmed Group Medical Doctor
The information provided is for general educational purposes and does not replace an individual medical consultation.
Last reviewed: March 2026