How breastmilk helps protect your bub during cold and flu season

We’ve just wrapped up a gorgeous Aussie summer, but with autumn here and winter on the way, it’s time to prep for the inevitable colds and flus - especially for bubs. In this week’s blog, we chat with IBC Lactation Consultant and mum of four, Ellen Gulson, about the powerful immune benefits of breastmilk. This conversation is especially timely following the government’s announcement of the RSV vaccine rollout in Australia.

This topic hits close to home. When my eldest started daycare, we were hit hard with bugs and viruses, including a brutal case of RSV - one I caught while pregnant. It knocked me out for weeks. Fast forward to a few months ago: it was my 9-month-old’s turn. But this time we were more prepared. We avoided the ED and managed everything through our GP. On our final visit, the doctor noted I was still breastfeeding and said my milk likely helped soften the blow. MIND BLOWING.

So I reached out to Ellen to learn more about the science. She’s not only an IBCLC but also the Head of Operations at the Australian Breastfeeding Association. Here’s what she shared with me.

Breastmilk and Baby Immunity

Breastmilk is more than just nutrition - it’s packed with immune-boosting properties that help protect babies during their most vulnerable months. Ellen explained, “Colostrum is the baby's first 'vaccination' helping to transfer crucial antibodies from mum to baby.”

This thick, golden milk - produced from around 36 weeks until birth - is loaded with antibodies that help kickstart a newborn’s immune system. For my second baby, I hand-expressed colostrum and froze it ahead of time. I used Bubka Silver Shields to collect it and stored it in syringes provided by my IBCLC. Having that liquid gold ready gave me peace of mind in hospital - and dad got to do a powerful first feed too.

Image by Daniella Stein Photography

Every Drop Counts

Ellen pointed out: “Any breastmilk your baby gets is great for their immunity. Even mixed-fed babies receive protective antibodies from breastmilk.” It doesn’t have to be all or nothing - any amount of milk can support your baby’s immune system.

Understanding RSV and the New Vaccine

“RSV is the leading cause of respiratory tract infections in babies, and we’re now entering RSV season,” Ellen says. A 2022 study from the American Academy of Pediatrics found that both exclusive and partial breastfeeding reduced RSV severity, hospital stay length, and oxygen requirements.

That means breastfeeding - at any level - helps keep your baby safer during cold and flu season.

What Is RSV and Why Is It Serious for Babies?

RSV (Respiratory Syncytial Virus) causes upper and lower respiratory tract infections. Symptoms include runny nose, cough, and fever - but in babies under 12 months (especially under six), RSV can lead to serious complications like pneumonia and bronchiolitis. RSV in infancy may also increase the risk of developing asthma later in life.

Why Vaccination During Pregnancy Matters

Vaccination during pregnancy helps protect infants in their first few months - when they’re most vulnerable. The vaccine stimulates an immune response in the mother, and antibodies are passed to the baby via the placenta. These antibodies offer early protection against RSV after birth.

What’s the Hype About the New RSV Vaccine for Newborns?

The new RSV vaccine rollout is a big deal for Aussie parents. It’s the first time we’ve had this level of protection available. But access varies by state and territory, so it’s important to check what’s happening in your region.

How to Check Eligibility

• Visit your state or territory health department’s RSV page
• Ask your maternity care provider or paediatrician if your baby is eligible
• Watch for local announcements as rollout details are still evolving

Want to Learn More?

Breastfeeding plays a huge role in infant health. Here are some excellent expert resources:

• Breastfeeding and Immunity – ABA
• What’s So Great About Breastmilk?
• AAP: Breastfeeding and RSV Severity Study

Stay in the Loop

This rollout is evolving in real time. We’ll keep this post updated as new info becomes available. In the meantime, check out the official government RSV vaccine FAQ.

Need Support?

If you're looking for a great IBCLC, reach out to Ellen Gulson via her website or on Instagram @ellengulsonibclc