Influenza A and B in Kids: Symptoms, Treatment & When to See a GP

Influenza A and B in Kids: Symptoms, Treatment & When to See a GP 

Influenza (flu) is a seasonal viral infection that can cause serious illness in children. This article helps parents identify flu symptoms, manage care at home, and know when to seek medical help. It covers both Influenza A and B, how they present in children, and prevention tips.

For more information, read our article: Everything You Need to Know About the Flu

Why the Flu Is More Serious for Children

Children under 5, especially babies under 6 months, are at higher risk of complications from the flu. In Australia, this age group has some of the highest rates of influenza-related hospitalisation. Complications can include pneumonia, dehydration, febrile seizures, and in severe cases, death. Even healthy children can experience severe illness.

Flu Symptoms in Kids: What to Look Out For

Flu symptoms in children can appear suddenly and range from mild to severe. Common signs include:

• Fever and chills

• Cough or sore throat

• Fatigue and body aches

• Headache and nasal congestion

• Nausea or vomiting (more common in children than adults)

Influenza A often comes on suddenly and can cause higher fevers and stronger body aches, while Influenza B may develop gradually with less severe symptoms but can linger longer. Recognising these early can help prevent complications and ensure timely care.

If your child has a high fever, difficulty breathing, or is not drinking fluids, seek medical advice promptly.

Caring for a Child with the Flu

Most cases of flu in children can be managed at home. Parents should focus on rest, fluids, fever relief, and close monitoring for any worsening symptoms. If your child’s condition doesn’t improve or new symptoms appear, contact your GP for advice.

Home Remedies and Comfort Care

Most children with the flu recover at home with supportive care. Encourage plenty of rest to help the immune system fight the virus and keep fluids up to prevent dehydration. Offer water, diluted juice, or oral rehydration solutions. For comfort:

• Use a cool-mist humidifier to ease congestion.

• Offer warm soups or soft foods if they can eat.

• Dress them in light clothing to help manage fever.

• Encourage quiet play and avoid screen time if tired.

Keep your child home from school or daycare until they are fever-free for at least 24 hours without medication, and symptoms are improving. This helps prevent spreading the virus to others.

Medicine and Treatment Options

For fever or pain, use paracetamol or ibuprofen in the correct dose for your child’s age and weight. Never give aspirin to children, as it may cause serious side effects. Avoid adult cold and flu medicines, which can be unsafe for kids.

In some cases, a GP may prescribe antiviral medication such as oseltamivir, which works best when started early in the illness.

When to Worry About the Flu in a Child

See a doctor promptly if your child shows severe or worsening symptoms, such as:

• Breathing difficulties (fast, noisy, or laboured breathing)

• Persistent high fever not easing with medication

• Dehydration signs – dry lips, no tears, or not urinating

• Extreme tiredness, confusion, or seizures

Babies under 6 months are particularly vulnerable to flu complications and should always be assessed by a GP or emergency service if unwell. If your child’s condition suddenly deteriorates, call 000 or go to the nearest emergency department.

How to Prevent the Flu in Children

The best protection against influenza is the annual flu vaccine. It’s recommended for everyone aged 6 months and older and is free under Australia’s National Immunisation Program for certain age groups and conditions.

• Good hygiene also helps reduce spread.

• Wash hands regularly.

• Cover coughs and sneezes.

• Keep sick children home until they recover.

Learn more: Flu Vaccination Services

Babies under 6 months cannot receive the flu vaccine. Protect them by vaccinating yourself and limiting their exposure.

Common Questions About Flu in Children

How long does the flu last in kids?

Most children recover from the flu within 7 to 10 days. Fevers and body aches often ease after three to five days, but cough and tiredness can linger for another week. Encourage rest, fluids, and good nutrition to support recovery. If your child’s symptoms last longer than 10 days or worsen, see your GP to rule out complications such as ear infections or pneumonia.

When should I take my child to the doctor for the flu?

Seek prompt medical attention if your child has trouble breathing, persistent high fever, vomiting, or is unusually drowsy or irritable. Babies under six months should be checked any time they show flu-like symptoms, as they’re more prone to dehydration and breathing problems. Visit an emergency department or call 000 if your child becomes unresponsive or has severe difficulty breathing.

What’s the best flu medicine for toddlers?

The best approach is comfort care with rest, fluids, and fever reducers such as paracetamol or ibuprofen (follow age-appropriate dosing). Avoid aspirin and adult cold/flu medicines, which can be harmful to children. If symptoms start within 48 hours, your GP may consider antiviral medication to shorten recovery time and reduce complications.

Can my child go to school with mild flu symptoms?

Children with any flu symptoms, no matter how mild, should stay home until fever-free for at least 24 hours without medication and feeling well enough to participate. Returning too soon increases the risk of spreading the virus to others and slows recovery. Schools and childcare centres may require a medical clearance before return.

Is the flu vaccine safe for babies and toddlers?

Yes. The flu vaccine is safe and recommended for all children aged 6 months and older. Side effects are usually mild and short-lived, such as redness at the injection site or a low-grade fever. Annual vaccination is important because flu strains change each year. Speak to your GP or nurse about age-appropriate vaccines.

Can a child get the flu twice in one season?

Yes, it’s possible. Children can catch different flu strains (Influenza A and B) in the same season. The flu vaccine provides protection against multiple strains, reducing the chance of reinfection or severe illness. Maintaining good hygiene, handwashing and covering coughs, adds extra protection.

What if my child has the flu and asthma?

Children with asthma are at higher risk of flu-related complications. The infection can trigger asthma flare-ups or breathing difficulties. Keep using prescribed preventer and reliever medications, monitor symptoms closely, and seek medical advice if breathing worsens. Annual flu vaccination is strongly recommended for children with asthma.

Book a Flu Vaccine or GP Appointment at Myhealth 

Protect your family this flu season with care from our GP-led Myhealth team. Our doctors offer flu vaccinations for children and adults, along with expert care for flu symptoms, asthma management, and other respiratory conditions.

Book your flu vaccine or GP appointment today through the Myhealth online booking system or by visiting your nearest Myhealth Medical Centre. Early protection helps keep your child, and your community safe this winter.