FluMist Vaccine: What Is It and How Does It Work?

Influenza, or the flu, is a contagious respiratory illness caused by influenza viruses. It can lead to mild to severe illness and sometimes serious complications, especially among young children, older adults, and people with certain health conditions. Every year, vaccination remains the best way to help reduce the risk of catching the flu or developing complications.

While most people are familiar with the traditional flu injection, there is also a needle-free option called the FluMist vaccine. This vaccine is delivered through the nose and is particularly useful for individuals who prefer an alternative to injections.

What Is the FluMist Vaccine?

The FluMist nasal spray is a type of influenza vaccine given through the nose instead of a shot. It contains weakened live influenza viruses that cannot cause the flu but can trigger the body’s immune system to recognise and fight the infection if exposed later on.

How Does the FluMist Nasal Spray Work?

When the FluMist nasal spray is administered, it introduces a small amount of weakened influenza virus into the nasal passages. This exposure helps the immune system create antibodies that protect against future infection.

Because the vaccine is delivered directly into the nose, where the flu virus usually enters the body, it helps build both local and systemic immunity. The immune system remembers the virus and responds more effectively if exposed to the real flu virus later.

Who Can Receive the FluMist Vaccine?

The FluMist vaccine is approved for healthy individuals and offers an option for those who are eligible and would rather avoid injections.

However, not everyone can receive this vaccine.

FluMist is not recommended for:

• Anyone with a severe allergy to eggs or any inactive ingredients in the vaccine
• Anyone who has had a serious allergic reaction to a previous influenza vaccine
• Children and adolescents aged 2 to 17 years taking aspirin or aspirin-containing medicines

If you are unsure whether any of these apply to you or your child, consult your healthcare provider before getting vaccinated.

FluMist vs Flu Shot

The main difference between FluMist and the traditional flu shot lies in how the vaccine is delivered and the immune response it triggers.

• FluMist (Nasal Spray): Uses weakened live viruses and is sprayed into the nose. It is needle-free but not suitable for people with weakened immune systems, pregnant women, or certain medical conditions.
• Flu Shot (Injection): Contains inactivated (killed) viruses and is administered as an injection. It is suitable for most people, including those with chronic health conditions.

Both vaccines protect against the same influenza strains and are updated annually based on global recommendations. Your healthcare provider can help determine the best option for you or your child.

Possible Side Effects of FluMist

Like all vaccines, FluMist may cause side effects, although most are mild and resolve within a few days.

Common side effects include:

• Runny or stuffy nose
• Sore throat
• Fever over 100°F

Other possible side effects:

• Decreased appetite
• Irritability
• Tiredness
• Cough
• Headache
• Muscle aches
• Chills

Seek immediate medical attention if you experience:

• Hives or severe skin reactions
• Swelling of the face, lips, tongue, or throat
• Difficulty breathing or swallowing
• Chest tightness or discomfort
• Dizziness or fainting
• Severe abdominal pain, vomiting, or diarrhoea

This is not a complete list of side effects. Always consult your healthcare provider if you notice unusual symptoms after vaccination.

Frequently Asked Questions (FAQs)

What type of vaccine is FluMist?
FluMist is a live attenuated influenza vaccine (LAIV) that uses weakened flu viruses to stimulate immunity without causing the flu.

Is FluMist better than the flu shot?
Neither vaccine is universally better. Both provide similar protection. The best option depends on age, health condition, and personal preference.

What is the age limit for the FluMist vaccine?
FluMist is approved for healthy individuals aged 2 to 49 years. It is not recommended for children under 2 or adults aged 50 and above.

How does the flu nasal spray work?
It delivers weakened influenza viruses into the nasal passages, prompting the immune system to produce antibodies against the flu.

Does FluMist require a prescription in Singapore?
Yes. FluMist must be prescribed or administered by a licensed healthcare provider in Singapore.

When to See a Healthcare Provider

If you are unsure whether FluMist or the injectable flu vaccine is suitable for you or your child, consult a healthcare provider. They can assess medical history and recommend the best option based on current guidelines.

Vaccination, along with good hygiene, proper rest, and balanced nutrition, remains a key part of influenza prevention.

Get Your Flu Vaccine at Care Connect Clinic

At Care Connect Clinic, flu vaccinations are available for both adults and children. Our medical professionals will help you choose between the FluMist nasal spray and the flu shot based on your health needs.

Book your appointment today to discuss your vaccination options and stay protected this flu season.