Ebola virus may persist in the brain for years after recovery, raising concerns about long-term health effects.

Ebola Virus Can Lurk in the Brain for Years After Infection

A recent study published in Nature Microbiology reveals that the Ebola virus can remain hidden in the human body for extended periods, potentially lasting years after the initial infection. This stealthy survival occurs without detection by the immune system, increasing the risk of late relapses in survivors.

Virus Hides in Immune-Privileged Areas

The research indicates that the Ebola virus can establish itself within the central nervous system, particularly in the brain. These regions possess immune privilege, meaning the immune system does not mount a strong response to protect sensitive tissues. Consequently, this allows the virus to persist without being completely eradicated.

Experiments on Brain Organoids

As part of the study, scientists programmed human stem cells to create brain organoids, which are three-dimensional structures resembling the brain. The findings demonstrated that the Ebola virus:

• Infected multiple types of neurons.
• Managed to replicate for up to 120 days.
• Spread in two ways: from an infected cell to a neighboring cell or through budding from the host cell, the traditional method of viral spread.

Researchers’ Statements and Study Significance

Lina Federspiel, the lead researcher at the German Army Institute of Microbiology in Munich, stated, “These brain organoids allow us to study the mechanisms the Ebola virus uses to survive in the central nervous system in detail.” She added that these results contribute to understanding the long-term effects experienced by some survivors, such as severe inflammation or encephalitis, which can be fatal complications.

These findings represent a significant step toward understanding how the virus remains in the body after recovery. They also highlight the need for long-term monitoring of Ebola survivors, particularly those exhibiting neurological symptoms.

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