RSV in Babies: Symptoms, Emergencies and New Protection Options

RSV (respiratory syncytial virus) is a respiratory virus that usually passes like a simple cold in adults. But in young babies it can cause bronchiolitis and lead to a hospital stay. According to the World Health Organization (WHO), RSV is the most common cause of lower respiratory tract infections in young children worldwide, and about half of RSV-related deaths occur in babies younger than 6 months. According to the American Academy of Pediatrics (AAP), almost every child has had RSV at least once by age 2.

Season and risk groups:

• RSV has a season and usually peaks in the colder months (in Turkey, for example, October to March). Timing differs by country and hemisphere, so ask your pediatrician when your local season runs.
• Those most at risk: babies younger than 6 months, babies born preterm, babies with congenital heart disease or chronic lung disease, and babies with weakened immunity.
• Healthy, full-term babies can also get very sick; that is why it is worth knowing about for every family.

Symptoms: A few days after infection, a runny nose, stuffy nose, cough, sneezing and fever start gradually. According to the NHS, the hardest days are usually days 3-5, while the cough can last up to 3 weeks. In very young babies, the only signs may be fussiness, reduced movement or difficulty breathing.

⚠️ Call your local emergency number or go to the ER right away if:

• The chest or belly pulls in with each breath, the nostrils flare, there is a grunting sound with every breath, or breathing is very fast and labored
• There are pauses in breathing
• The lips, tongue or nail beds turn blue or gray
• Your baby cannot be woken, is unresponsive or is very floppy
• A baby under 3 months has a fever of 38°C (100.4°F) or higher (see a doctor or go to the ER without delay)

See a doctor the same day if:

• Feeding has dropped noticeably (half the usual amount or less)
• There are fewer wet diapers, or the diaper has been dry for 12 hours
• A 3-6 month old has a fever of 39°C (102.2°F) or higher, or an older baby has a high fever that will not come down
• There is extreme tiredness or a change in behavior
• You just do not feel right about it. A parent's instinct is an important signal.

Home care:

• There is no specific medicine for RSV; the body fights off the virus itself. The goal is to keep your baby comfortable and prevent dehydration.
• Breastfeed or give formula little and often. A baby with a blocked nose may only manage small amounts at a time.
• Putting saline drops in the nose before feeds and gently clearing it with an aspirator makes feeding easier.
• Holding your baby a little upright while awake can help. During sleep, follow safe sleep rules: on the back, on a flat surface.
• Do not give babies over-the-counter cough and cold syrups. Do not give aspirin.
• Give fever reducers only as the medicine and dose your doctor recommends. In a baby under 3 months, always see a doctor before giving a fever reducer.
• No one should smoke near your baby or in the home.

A new era in protection: there are two options.
In recent years, two ways have been developed to protect babies during their first RSV season. Both aim to prevent severe illness in the first months, when babies are most vulnerable.

• RSV vaccine for the mother-to-be: With a vaccine given during pregnancy, the mother makes antibodies that pass to the baby through the placenta. Protection lasts about 6 months after birth. The recommended week of pregnancy differs by country: the US recommends weeks 32-36, WHO recommends after week 28, and product labeling in some countries allows weeks 24-36. It is usually recommended for those who will give birth during RSV season.
• Long-acting antibody for the baby (nirsevimab): This is not a vaccine but a ready-made antibody. A single injection gives at least 5 months of protection. Babies born during the season get one dose shortly after birth; babies born outside the season ideally get one dose before the season starts.

Are both needed? Usually not. The US Centers for Disease Control and Prevention (CDC) says most babies do not need both, and that if the mother was vaccinated, the baby usually does not need the antibody. However, if the baby was born within 14 days of the vaccine, or is in a high-risk group, the doctor may still recommend the antibody.

Availability and cost: Whether the maternal RSV vaccine and nirsevimab are offered through your national immunization program, covered by insurance or available only privately depends on where you live. An older antibody (palivizumab) is used for babies born very early or with serious heart or lung disease, and may be covered under certain conditions. Talk with your OB-GYN during pregnancy, or your pediatrician after birth, about which option suits you, how to access it and what it costs.

Everyday precautions:

• Wash your hands before touching your baby, and ask visitors to do the same.
• It is best if people with a cold or cough do not kiss or hold your baby.
• In the first months, especially during the season, limit crowded indoor places.
• Keep frequently touched surfaces clean.
• Breast milk supports immunity; keep breastfeeding.
• A smoke-free home is the best environment for your baby's lungs.

Dear mom, RSV season can be worrying, but most babies recover with home care in 1-2 weeks, though the cough can last a little longer. Your job is to recognize the red flags: trouble breathing, pauses in breathing, turning blue, a big drop in feeding and dry diapers. If you see any of these, get help without waiting. If you are pregnant, remember to ask your doctor about protection options at your next checkup.