Measles Complications: SSPE After Infection – Gavi

September 16, 2025 Jennifer Chen Health
News Context
At a glance
  • Subacute Sclerosing Panencephalitis (SSPE) is⁤ an extremely ⁤rare, but devastating, neurological disease that ⁤develops years after a person has been infected with measles.
  • The term "subacute" refers to the gradual onset and progression of the disease, "sclerosing" indicates the hardening of brain tissue, and "panencephalitis" means inflammation of ⁣the entire brain.
  • Instead,it arises from a persistent measles virus that remains in the body long after the initial infection⁤ has cleared.
Original source: gavi.org

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Subacute Sclerosing Panencephalitis (SSPE): Understanding This Rare Measles⁢ complication

Table of Contents

What is SSPE?

Subacute Sclerosing Panencephalitis (SSPE) is⁤ an extremely ⁤rare, but devastating, neurological disease that ⁤develops years after a person has been infected with measles. It’s caused by a persistent,defective measles virus that slowly damages the brain. While measles is preventable through vaccination, SSPE remains a tragic consequence for a small number of⁣ individuals who contract the initial infection.

The term “subacute” refers to the gradual onset and progression of the disease, “sclerosing” indicates the hardening of brain tissue, and “panencephalitis” means inflammation of ⁣the entire brain. SSPE is almost exclusively seen in individuals who contracted measles⁣ before widespread vaccination programs were implemented.

What Causes SSPE?

SSPE isn’t caused by a ⁢new measles infection. Instead,it arises from a persistent measles virus that remains in the body long after the initial infection⁤ has cleared. This persistent virus, tho defective, continues to replicate slowly in‍ the‍ brain. The exact mechanisms by which ⁢the virus causes brain⁢ damage ⁣are still being researched, but it’s believed to involve an abnormal immune response and direct viral damage to neurons.

It’s⁣ important to note that not everyone who gets measles‍ will develop SSPE. The risk is very low, estimated to be around 1 in 1 million measles ⁢cases. Though, the risk is significantly higher ‍in individuals who contract measles at a‍ very young age.

Symptoms of SSPE

The symptoms of SSPE develop ⁣gradually over months or years. Early symptoms are often subtle and can be mistaken for other conditions. As the disease progresses, symptoms become more severe and debilitating.