What is the difference between the MenACWY and MenB vaccines?

They cover different groups of the same bacterium. MenACWY protects against groups A, C, W and Y in one vaccine; MenB protects against group B, which needed a different kind of vaccine to develop. A schedule may use one, the other, or both at different ages.

Why is MenB given to babies but MenACWY often to teenagers?

Group B causes most infant cases, so MenB is given in the first months of life. Group W and Y disease rises again in adolescence, and teenagers carry the bacteria most, so a teenage MenACWY dose protects them and reduces spread.

What is the rash that does not fade?

Pressing a clear glass against the skin is the usual check. Most childhood rashes go pale under pressure; a meningococcal rash of small red or purple spots stays visible. It can be a late sign, so do not wait for it if a child is deteriorating.

Disease

Meningococcal disease

An uncommon bacterial infection that can cause meningitis and turn serious within hours.

Reviewed by TinyDose editorial teamLast reviewed June 2026

What it is

An uncommon bacterial infection that can cause meningitis and turn serious within hours.

Main symptom

Fever, often with cold hands and feet

How it spreads

Spreads through close, prolonged contact with respiratory droplets or saliva, such as living in the same household, coughing or kissing.

Prevented by

MenACWY, MenB

Meningococcal disease is caused by the bacterium Neisseria meningitidis. Many people carry it harmlessly in the nose and throat, but occasionally it invades the bloodstream or the lining of the brain, causing septicaemia or meningitis. It is uncommon, and it is feared because of its speed: a child can go from seeming unwell to critically ill within a day. Several groups of the bacterium exist, which is why schedules use more than one vaccine, typically MenACWY and MenB.

Symptoms

Fever, often with cold hands and feet
Severe headache and a stiff neck in older children
Dislike of bright light
A rash of small red or purple spots that does not fade when pressed
In babies, a bulging soft spot, a high-pitched cry, refusing feeds or being floppy

How it spreads

Spreads through close, prolonged contact with respiratory droplets or saliva, such as living in the same household, coughing or kissing.

Incubation2-10 days, most often 3-4 days

Why it's serious

This is a rare illness, and most fevers are nothing like it. What makes it different is the pace: the advice everywhere is that if a child is deteriorating quickly, or has a rash that does not fade under pressure, they need urgent medical assessment rather than watchful waiting.

Septicaemia, blood poisoning that can damage limbs and organs
Hearing loss, a common lasting effect of meningitis
Brain injury affecting learning and development
Limb amputation after severe septicaemia
Death, which remains possible even with prompt treatment

Most at risk: Babies and toddlers have the highest risk, with a second peak in teenagers and young adults. Risk is also higher without a working spleen or with certain immune conditions.

How to prevent Meningococcal disease

Vaccination is the most effective protection. Meningococcal disease is prevented by:

VaccineMenACWYProtects against four groups of the bacteria that cause meningococcal meningitis.About the MenACWY vaccine →VaccineMenBProtects against meningococcal group B, the main cause of meningitis in babies.About the MenB vaccine →

Treatment

Treated in hospital with intravenous antibiotics, started as soon as it is suspected rather than after tests confirm it. Close contacts are usually given preventive antibiotics.

Common questions

Sources

Meningococcal vaccines: WHO position paper · WHO, 2023.
Meningococcal Disease · CDC, 2026.

Information on this page is compiled from authoritative public health sources and written in TinyDose's own voice. It is intended for general understanding only. Always follow your pediatrician's guidance.

Protect your child against Meningococcal disease, TinyDose reminds you when each vaccine is due.

Free on iOS and Android.

App Store Google Play Learn more →

← All diseases

From the blog

All guides →

This information is provided by TinyDose for general understanding only and is not medical advice. Vaccine names, ages and doses can vary by country, brand and individual circumstances. Always follow the guidance of your pediatrician or local health authority for your child’s vaccination schedule.