It might look like a common cold or flu. But within hours, it could become deadly.

Meningitis B is a rare but fast-acting bacterial infection that affects people of all ages. What makes it so dangerous is how easily it hides — often starting with vague symptoms like a headache or fever. But behind those mild signs can be a disease that leads to brain damage, sepsis, or even death in less than 24 hours.

Most people don’t know they’re at risk — until it’s too late.

👉 Read more below to learn how this disease works, who it affects, and how to protect yourself.

What Is Meningitis B?

Meningitis B is caused by a bacteria called Neisseria meningitidis group B. It infects the protective lining of the brain and spinal cord. In some cases, it enters the bloodstream, spreading rapidly and triggering organ failure or death.

The infection is rare but extremely aggressive. Even with medical care, 1 in 10 people with meningococcal disease may die, and survivors often face serious long-term effects.

Early Symptoms Can Be Misleading

That’s what makes Meningitis B so dangerous: it doesn’t always look serious at first. Watch for:

• High fever

• Headache

• Nausea or vomiting

• Cold hands and feet

• Pale or blotchy skin

• Stiff neck

• Confusion

• Sensitivity to light

• A purple rash (often appears later)

In many cases, people feel fine in the morning — and are in intensive care by night.

Who’s at Risk?

While anyone can get it, certain groups are more vulnerable:

• Babies and young children

• Teenagers and college students

• Adults living in shared spaces (like dorms or barracks)

• People with weakened immune systems

• Adults over 60

Even healthy individuals can be affected. That’s why knowing the signs and getting vaccinated is key.

Is There a Vaccine?

Yes — but many people don’t realize they need to ask for it. The MenB vaccine is not always part of the standard immunization schedule in every country.

There are two approved vaccines — Bexsero and Trumenba — which help protect against this specific strain.

If you're unsure whether you're covered, talk to your doctor.