Is the RSV vaccine safe during pregnancy?

Is the RSV Vaccine Safe During Pregnancy?

Respiratory Syncytial Virus (RSV) can cause severe lung and breathing problems in newborns and infants. In 2023, health authorities approved an RSV vaccine specifically for pregnant people to help protect babies during their first vulnerable months. Below, you’ll find clear, up-to-date information on RSV vaccine pregnancy safety, benefits, side effects, and practical steps you can take.

What Is RSV and Why Maternal Vaccination Matters

RSV is a common virus that usually causes mild, cold-like symptoms in older children and adults. In babies under 6 months, however, RSV can lead to:

• Bronchiolitis (inflammation of small airways in the lungs)
• Pneumonia
• Hospitalization for breathing support

Vaccinating pregnant people helps antibodies pass through the placenta, giving newborns early protection during peak RSV season (fall through spring).

Which RSV Vaccine Is Recommended in Pregnancy

• Vaccine name: RSVpreF (brand name Abrysvo)
• Manufacturer: Pfizer
• Approval: In 2023, U.S. and European regulators authorized its use in pregnancy
• Timing: ACOG (American College of Obstetricians and Gynecologists) and CDC advise a single dose between 32 and 36 weeks of gestation

Safety Data from Clinical Trials

Large studies enrolled over 7,000 pregnant participants across multiple countries. Key findings include:

• No increase in serious pregnancy complications (preterm birth, preeclampsia, stillbirth) compared with placebo
• Common mild side effects similar to other vaccines:
  • Soreness at injection site
  • Mild fever (lasting 1–2 days)
  • Fatigue or headache
• No evidence of harm to the fetus: birth outcomes and newborn health mirrored those in unvaccinated mothers

These safety outcomes align with decades of data on other maternal vaccines (e.g., pertussis, flu).

Benefits of RSV Vaccination in Pregnancy

• Newborn protection: Antibodies cross the placenta, reducing RSV hospitalization risk by up to 80% in the first 3 months of life.
• Peace of mind: Lower chance of emergency breathing support for your baby.
• Community impact: Fewer severe cases eases the burden on hospitals during RSV peaks.

What to Expect After Vaccination

You may experience mild side effects, which are generally short-lived and manageable at home:

• Injection-site pain or redness
• Low-grade fever or chills
• Muscle aches or headache

Most people feel back to normal within 48 hours. If discomfort persists beyond 3 days or symptoms worsen, contact your healthcare provider.

Addressing Common Concerns

“I’m worried about long-term effects on my baby.”
Decades of maternal vaccine research (including flu and Tdap) show no long-term risks. With RSVpreF, follow-up data confirm healthy infant growth and development through at least six months.

“Could the vaccine trigger preterm labor?”
Clinical trials found no increase in preterm birth rates compared to unvaccinated groups.

“I already got my flu shot—can I get both?”
Yes. You can safely receive the RSV vaccine alongside other recommended vaccines during the third trimester. Staggering appointments by a few days can reduce overlap of side effects if you prefer.

Who Should Get the RSV Vaccine During Pregnancy

The RSV vaccine is recommended for:

• All pregnant people between 32 and 36 weeks of pregnancy, regardless of age or health status
• Those expecting multiples (twins, triplets) to maximize antibody transfer
• People with medical conditions (e.g., asthma, diabetes) that may affect pregnancy

Your provider can help you decide whether vaccination timing fits your individual prenatal schedule.

Steps to Take Before and After Vaccination

1. Discuss with your obstetrician or midwife
   • Confirm the ideal window (32–36 weeks)
   • Review your medical history and any allergies
2. Plan for mild side effects
   • Keep a cold compress or over-the-counter pain reliever (approved by your provider) on hand
3. Monitor your health
   • Track any unusual symptoms for 2–3 days
   • Record your injection date for your prenatal record
4. Seek medical advice if needed
   • High fever (over 102°F or 39°C) lasting more than 48 hours
   • Severe injection-site swelling or redness expanding beyond a few inches
   • Any breathing difficulty, chest pain, or other worrying signs

If you’re ever unsure about symptoms you or your baby are experiencing, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.

Real-World Experience and Expert Recommendations

• CDC stance: Strongly recommends RSV vaccination in pregnancy to protect infants.
• ACOG guidance: Rates maternal RSV vaccination alongside flu and Tdap as standard prenatal care.
• Patient surveys: Over 90% of vaccinated pregnant people report satisfaction and would choose it again.

Balancing Risks and Benefits

Every medical decision involves weighing potential benefits against possible side effects. In this case:

• Benefits
  • Significant infant protection during critical first months
  • No observed increase in serious pregnancy outcomes
• Mild Risks
  • Temporary discomfort at injection site
  • Low-grade fever or fatigue for a day or two

Overall, leading obstetric and pediatric experts agree that maternal RSV vaccination provides more benefits than risks.

Questions to Ask Your Healthcare Provider

• Am I in the recommended window for the RSV vaccine?
• How does this vaccine fit with my other prenatal shots?
• What should I do if I develop a fever or other side effects?
• Is there anything in my medical history that changes the RSV vaccine recommendation?

Key Takeaways

• Maternal RSV vaccination during weeks 32–36 is recommended to protect newborns.
• Clinical trials show the vaccine is safe for both pregnant people and babies.
• Mild, short-lived side effects are common; serious complications are not.
• Always discuss with your provider if you have concerns or a complex medical history.

If you experience any severe or life-threatening symptoms—either related to vaccination or otherwise—please speak to a doctor right away. Your healthcare team is the best resource for urgent concerns.

For quick reassurance about everyday symptoms, try a free, online symptom check, using the doctor approved Ubie Symptom Checker.

Stay informed, stay protected, and speak to your doctor about any questions or serious health issues.