MenACWY Vaccine

The MenACWY vaccine is a conjugate vaccine that protects against four types of meningococcal bacteria: A, C, W, and Y.

What does the vaccine do?

The MenACWY vaccine helps prevent invasive meningococcal disease (IMD), which can cause severe and potentially life-threatening infections such as:

  • Meningitis (inflammation of the lining around the brain and spinal cord)
  • Septicemia (blood infection)
  • Other serious infections

Who should get vaccinated?

The Centers for Disease Control and Prevention (CDC) recommends that the following groups receive the MenACWY vaccine:

  • All preteens and teens at 11 to 12 years old, with a booster dose at 16 years old
  • Young adults aged 18-23 years, especially those attending college or living in close quarters
  • People with certain medical conditions, such as spleen damage or immune system disorders
  • Travelers to areas where meningococcal disease is common
  • Military recruits

Administration and dosage

The MenACWY vaccine is typically administered as a single dose, with a booster dose given 5 years later for individuals who received their first dose at age 11-15. For those who receive their first dose at age 16 or older, a booster dose is not routinely recommended.

Contraindications and precautions

The MenACWY vaccine should not be given to:

  • People with a history of severe allergic reaction to any component of the vaccine or to previous doses of the vaccine
  • People with a weakened immune system, such as those with HIV/AIDS or taking immunosuppressive therapy

The vaccine should be used with caution in people with certain medical conditions, such as Guillain-Barré Syndrome.

Possible side effects

Common side effects of the MenACWY vaccine include:

Vaccine effectiveness

The MenACWY vaccine is highly effective in preventing invasive meningococcal disease caused by serogroups A, C, W, and Y. Studies have shown that the vaccine can provide protection for at least 5 years.

Frequently Asked Questions (FAQs)

What is the MenACWY vaccine?
A vaccine that protects against meningococcal disease.

What does MenACWY stand for?
Meningococcal conjugate vaccine against serogroups A, C, W, and Y.

Who should get the MenACWY vaccine?
Preteens, teens, and young adults, as well as people at increased risk.

How many doses of MenACWY are recommended?
2 doses, typically given at ages 11-12 and 16.

What is the typical age range for MenACWY vaccination?
11-23 years old.

Is the MenACWY vaccine effective?
Yes, it is about 85-90% effective against serogroups A, C, W, and Y.

Are there any common side effects of the MenACWY vaccine?
Pain, redness, or swelling at the injection site, as well as fatigue or headache.

Can the MenACWY vaccine be given with other vaccines?
Yes, it can be given at the same time as other recommended vaccines.

How long does protection from the MenACWY vaccine last?
At least 5 years, possibly longer.

Is a booster dose of MenACWY needed?
Possibly, for people at increased risk or in outbreaks.

Article last updated on: 25th June 2025.
If you have any feedback, please get in touch.

See more

 Conditions  Symptoms  Procedures

Diagnosis Pad
Medical AI Assistant with Differentials, Guidance, Transcriptions, Notes, Medical Encyclopedia and Explainable AI.


Available for iOS, macOS and Android.

Medical Disclaimer

The information provided is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read on this site. We we do not guarantee, and assume no legal liability or responsibility for the accuracy, currency, or completeness of the information provided.