As a parent, nothing is more important than your child’s health. One virus that continues to garner attention, particularly during the fall and winter months, is Respiratory Syncytial Virus (RSV). This virus is a major cause of respiratory illness in infants and young children and remains one of the leading causes of infant hospitalization here at Humber River Health and across Ontario. Understanding RSV, its symptoms, and preventive measures can help keep your little one safe during the 2025–2026 RSV season.

What is RSV?

RSV primarily affects the airways and lungs, often presenting as cold-like symptoms. For most healthy children, RSV may result in mild illness; however, it poses a greater risk for premature babies and babies under two years old. Because their immune and respiratory systems are still developing, these babies can become very ill if infected.

How RSV Spreads

RSV spreads easily through:

• Direct contact with infected individuals or contaminated surfaces
• Airborne droplets when an infected person coughs or sneezes

The virus is most active from late fall through early spring (typically October through April), making it essential to stay vigilant during these months.

Recognizing the Symptoms of RSV

Common symptoms of RSV include:

• Runny nose
• Cough
• Fever
• Wheezing
• Irritability
• Low energy or unusual tiredness
• Decreased appetite or fluid intake

If you notice these symptoms in your child—especially if they have trouble breathing, show signs of dehydration, or if their condition worsens—seek medical attention promptly.

Preventive Measures

Preventing RSV involves both good hygiene practices and medical options.

Good Hygiene

• Wash hands frequently
• Cough or sneeze into your arm
• Avoid smoking near your child
• Clean and disinfect surfaces regularly

Breastfeeding
If you’re able to, breastfeeding can provide your baby with additional antibodies.

Stay Home When Sick
Limit exposure by staying home when unwell and avoiding close contact with sick individuals.

What’s New in RSV Prevention for 2025-2026

Starting October 1, 2025, there are two main preventive options available for young children in Ontario:

1. Preventive Antibody Medication (Beyfortus™)

• What it is: A monoclonal antibody that acts like natural antibodies to help eliminate RSV.
• How it’s given: A one-time injection in the thigh muscle, offering protection for up to six months.
• Eligibility (2025–2026 season): Infants born April 1, 2025 and less than 8 months of age and for children under two years old at high risk of severe RSV.

2. Vaccine for Pregnant Persons (Abrysvo™)

• What it is: A vaccine administered to pregnant individuals to protect their babies.
• Timing: Given between 32 and 36 weeks of pregnancy.
• How it works: Helps the pregnant person’s immune system create antibodies that are passed to the baby, offering protection for the first six months of life.

How to Access Immunization

• If your baby is born in 2025 or early 2026, you will be offered Beyfortus™ during your hospital stay.
• Your healthcare team will review eligibility and provide information before discharge.

Conclusion

Protecting your newborn from RSV is a collective effort. By understanding the virus, recognizing its symptoms, and taking advantage of preventive options available in 2025–2026, you can significantly reduce the risk of severe illness in your child. For more information, speak with your healthcare provider or review the RSV Fact Sheet available in our resources section.

Your proactive approach can make a world of difference in keeping your child safe this RSV season.