Nasal Spray Flu Vaccine: What You Should Know

For many children and adults, the thought of getting an injection can make vaccination a daunting experience. But did you know that getting protected against influenza doesn't always have to involve a needle?

The nasal spray flu vaccine is a needle-free alternative to the traditional flu jab. Administered directly into the nostrils as an intranasal mist, it is a safe and effective vaccination option for individuals who prefer to avoid injections.

So, how does it work, and is it suitable for you or your child? Here's what you need to know.

What is the nasal spray flu vaccine, and how does it work?

The nasal spray flu vaccine is a live attenuated influenza vaccine. This means it contains weakened live viruses that stimulate the body’s immune system to develop immunity against influenza.

Unlike the conventional flu jab, which is delivered as an intramuscular injection, this vaccine is sprayed directly into the nostrils.

In Singapore, the trivalent nasal spray flu vaccine is approved for individuals aged 2 to 49 years and protects against three targeted influenza virus strains.

Like all flu vaccines, it helps lower your risk of contracting influenza from the covered strains. However, no vaccine offers 100% protection, and it is still possible to catch the flu even after being vaccinated.

It's also important to remember that the flu vaccine specifically protects against influenza, not other respiratory infections that may cause similar symptoms, such as the common cold. \t

Who can get the nasal spray flu vaccine?

The nasal spray flu vaccine may be an appropriate option for:

• Children aged 2 years and above who meet vaccination criteria, particularly those experience strong anxiety around needles.

• Teenagers and adults up to 49 years old who prefer a needle-free alternative to the traditional flu jab.

• Individuals who are medically eligible to receive a live attenuated vaccine.

Being within the approved age range does not automatically mean the nasal spray is right for everyone. Underlying medical conditions, current medications and certain allergies can affect your eligibility.

Your doctor will review your medical history during a consultation to advise whether the nasal spray or an injectable flu vaccine is more suitable for you or your child.

Nasal spray flu vaccine vs. traditional flu jab: What's the difference?

While both vaccines are designed to protect against influenza, they differ in how they are administered, their formulation, and their approved age groups.

Vaccine availability and suitability may vary. Always consult your doctor to determine the most appropriate option for your health needs.

Which flu vaccine should you choose?

If you or your child are uncomfortable with injections, the nasal spray vaccine is worth considering. However, because it is a live vaccine, it’s not necessarily suitable for everyone. Factors such as your age, medical history, immune status and lifestyle will determine the best choice.

Your doctor can help you weigh these factors and recommend a vaccine based on your individual health needs. \t \t

What happens during a nasal spray flu vaccination appointment?

Wondering what to expect during your visit? The process is quick and straightforward:

1. Medical assessment: Before vaccination, a healthcare professional will review your medical history, allergies and current medications to confirm your suitability for vaccination.

2. Nasal spray administration: The vaccine is gently sprayed into both nostrils by a healthcare professional — no needles needed.

3. After vaccination: Your healthcare professional will brief you on what to expect after the procedure, potential side effects, and when to seek medical advice if needed.

While the nasal spray avoids the discomfort of an injection, some individuals may experience mild, temporary nasal symptoms afterwards.

What are the possible side effects?

Like any medication or vaccine, the nasal spray flu vaccine can cause mild side effects as your immune system responds. Commonly reported side effects include:

• Runny or stuffy nose
• Headache
• Sore throat
• Cough

These side effects are generally short-lived and resolve on their own.

Severe side effects are extremely rare. Seek immediate medical attention if you experience symptoms of a severe allergic reaction, such as difficulty breathing or swelling of the face or throat.

If you have any concerns regarding potential side effects, discuss them with your doctor prior to vaccination. \t

Frequently Asked Questions (FAQs)

1. Can the nasal spray flu vaccine give you the flu?

No. Because the nasal spray contains a live, weakened (attenuated) virus, it cannot cause actual influenza in healthy individuals. However, as your immune system responds to the vaccine, you may experience mild, temporary symptoms such as a runny nose or sore throat.

Additionally, because the vaccine specifically targets selected strains, it does not prevent illness from other circulating flu strains or common cold viruses. If you feel unwell after vaccination and are concerned about your symptoms, consult a healthcare professional.

2. How long does it take for the nasal spray flu vaccine to work?

Immunity is not instant. It typically takes about two to three weeks for your body to build full antibodies and protection following vaccination.

If you are planning to travel or anticipate being in crowded environments with a higher risk of exposure, it is best to schedule your flu vaccination at least two weeks in advance.

3. Do I need to get vaccinated against influenza every year?

Annual flu vaccination is generally recommended for two key reasons:

• Evolving virus strains: Influenza viruses mutate constantly. Vaccine formulations are updated every year to target the specific strains expected to circulate.

• Waning immunity: Immune protection from a flu vaccine decreases over time.

Your doctor can review your health profile and recommend the appropriate annual vaccine formulation for you or your child.

4. Is the nasal spray flu vaccine suitable for my child?

The nasal spray flu vaccine is approved for individuals aged 2 to 49 years, making it an excellent needle-free option for eligible children.

However, age is only one factor. Because it is a live vaccine, children with certain medical conditions (such as severe asthma or weakened immune systems), specific allergies, or ongoing treatments may not be suitable candidates. Your family doctor will review your child's medical history to advise on the safest vaccination option.

5. Is the nasal spray flu vaccine subsidised in Singapore?

No. The nasal spray flu vaccine is currently not covered under government subsidies such as the National Childhood Immunisation Schedule (NCIS) or National Adult Immunisation Schedule (NAIS). Patients opting for the nasal spray will need to pay out-of-pocket.

However, eligible Singapore Citizens and Permanent Residents (PRs) can receive subsidised flu vaccinations under the NCIS or NAIS when receiving specific injectable flu vaccine formulations listed by the Ministry of Health (MOH). Speak to our staff at your preferred Parkway Shenton clinic to check subsidy eligibility and pricing.