Is the RSV Vaccine a One-Time Shot?

Respiratory syncytial virus (RSV) causes seasonal winter respiratory illness in infants, older adults and pregnant people. You may be asking: is the RSV vaccine a one time shot? The short answer is that most current RSV vaccines are given as a single dose per season or per pregnancy. Below, we break down who needs which dose, when, and why.

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What Is RSV and Who’s at Risk?

Respiratory syncytial virus (RSV) can cause everything from a mild cold to serious lung infections like bronchiolitis or pneumonia.

• Infants under 6 months – biggest risk for hospitalization
• Older adults (60 years and up) – increased risk of severe disease
• Pregnant people – passive protection to baby
• People with chronic heart or lung disease, weakened immunity

Unvaccinated people in these groups are more likely to need hospital care. Vaccination helps reduce severe RSV infection.

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Types of RSV Vaccines and Doses

Today’s FDA-approved RSV preventive products fall into two main categories:

1. Adult/adolescent RSV vaccines
   • Arexvy (GSK) – for ages 60+
   • Abrysvo (Pfizer) – for ages 60+ and maternal immunization

2. Monoclonal antibody for infants
   • Nirsevimab (Beyfortus) – for infants under 8 months at season start or under 19 months with risk factors

Adult/Adolescent RSV Vaccines

• Who: Anyone 60 years and older
• Dose: A single intramuscular injection (0.5 mL)
• Timing: Given before RSV season (fall/winter)
• Repeat? We don’t yet know if booster doses will be needed each season. Current guidance is one dose per season, pending more research.

Maternal RSV Vaccine

• Who: Pregnant people 32–36 weeks gestation
• Dose: One dose during every pregnancy
• Benefit: Antibodies cross the placenta, protecting baby for the first few months of life
• Repeat? One shot per pregnancy; you can get it again if you become pregnant another season.

Infant Monoclonal Antibody (Nirsevimab)

• Who: Infants < 8 months at RSV season start or < 19 months with conditions like chronic lung disease
• Dose: Single dose before or shortly after RSV season begins
• Protection: Passive immunity for the season
• Repeat? One dose per RSV season.

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Is the RSV Vaccine a One-Time Shot?

• For older adults and adolescents, RSV vaccination is one dose per season.
• For pregnant people, it’s one dose per pregnancy (typically 32–36 weeks gestation).
• For infants at high risk, the monoclonal antibody is one dose each season.

Bottom line: You don’t get a lifetime “one and done” RSV shot—current guidance is a single dose for each RSV season or pregnancy. Future studies will tell us if annual boosters are needed, similar to flu shots.

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Why One Dose per Season?

• RSV seasons recur annually, usually in fall through early spring.
• Immunity from a single dose appears strong enough to cover one season in older adults and infants.
• Pregnant people receive protection for their baby’s first critical months.

As data accumulates, recommendations may evolve. Stay tuned to the CDC and FDA for updates.

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Benefits vs. Possible Side Effects

Benefits

• Reduces hospitalizations for severe RSV disease
• Lessens symptoms like wheezing, difficulty breathing and dehydration
• Protects infants through maternal antibodies or monoclonal antibodies

Side Effects

Side effects are generally mild and short-lived:

• Injection site soreness, redness or swelling
• Fatigue, headache, muscle pain
• Occasionally mild fever

Serious allergic reactions are rare. Always report any concerns to your healthcare provider.

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Questions to Ask Your Doctor

• “Am I or my baby eligible for an RSV vaccine this season?”
• “When is the best time to schedule my shot?”
• “Are there any specific health conditions we should watch for?”
• “What symptoms warrant a follow-up visit or emergency care?”

If you ever feel unwell or notice severe breathing problems, chest pain, high fever or confusion, speak to a doctor immediately, as these could be signs of a serious condition.

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Monitor Your Symptoms at Home

Not sure if your cough or fever is RSV or something else? Try a free, online symptom check, using the doctor approved Ubie Symptom Checker to help guide your next steps. It’s quick, confidential and doctor-designed.

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Key Takeaways

• “Is the RSV vaccine a one time shot?”
  • Yes – one dose per season for older adults and infants, one dose per pregnancy for maternal protection.
• Current vaccines and monoclonal antibodies are designed for seasonal protection.
• Future guidance on annual boosters may change as more data emerges.
• Side effects are usually mild; serious reactions are rare.
• Always speak to a doctor about life-threatening or serious symptoms.

Stay informed through reliable sources like the CDC, FDA and your healthcare provider. Preventive care, including timely RSV vaccination, is one of the best tools to protect you and your loved ones each season.