HHV-6 encephalitis
MONDO:0027029HHV-6 encephalitis refers to inflammation of the brain due to an infection with human herpesvirus 6. People who have undergone allogeneic hematopoietic cell transplantation are at an increased risk for developing HHV-6 encephalitis, particularly when umbilical cord blood stem cells are used. People with immune system disorders may also be at an increased risk for developing this infection. Signs and symptoms vary, but often include confusion, anterograde amnesia (difficulty learning new information following the onset of amnesia), short-term memory loss, and seizures.Diagnosis often involves lumbar puncture, virus testing, and MRI. EEG 's may also be recommendedwhen seizures are suspected. HHV-6 encephalitis is treated with an antiviral agent with activity against HHV-6. Long term outlook (chance of full recovery) can vary considerably depending individual patient factors.
Also known as: Human Herpesvirus 6 encephalitis, Variant A or HHV-6A, Variant B or HHV-6B
8 clinical trials for this condition and its sub-types.
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Could immune checkpoint drugs tame a deadly brain virus?
Disease control Recruiting nowThis study is testing whether immune checkpoint inhibitors, drugs that help the immune system fight infections, can improve outcomes for people with progressive multifocal leukoencephalopathy (PML), a rare brain virus. Researchers will follow 66 patients over a year, measuring di…
Sponsor: Peking Union Medical College Hospital • Aim: Disease control
Last updated Jun 27, 2026 12:04 UTC
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Can donor cells stop viruses after transplant?
Disease control Recruiting nowThis study tests whether giving patients donor-derived immune cells (VSTs) on a regular schedule can prevent dangerous viral infections after a stem cell transplant. 180 participants will be randomly assigned to receive VSTs either on a fixed schedule or only when a virus is dete…
Phase: PHASE2 • Sponsor: Children's Hospital Medical Center, Cincinnati • Aim: Disease control
Last updated Jun 27, 2026 11:01 UTC
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Supercharged donor cells take on viruses after transplant
Disease control Recruiting nowThis study tests whether specially grown donor immune cells (viral-specific T-cells) can safely treat viral infections that often occur after a stem cell transplant. These infections can be serious and sometimes don't respond to standard antiviral drugs. The approach aims to boos…
Phase: PHASE1, PHASE2 • Sponsor: Children's Hospital Medical Center, Cincinnati • Aim: Disease control
Last updated Jun 27, 2026 08:04 UTC
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Scientists launch major study to track viruses in healthy and immunocompromised patients
Knowledge-focused Recruiting nowThis study aims to collect samples and medical information from people of all ages who have or have been exposed to viral infections, including COVID-19 and herpes. Researchers want to understand how viruses affect healthy individuals versus those with weakened immune systems. Pa…
Sponsor: National Institute of Allergy and Infectious Diseases (NIAID) • Aim: Knowledge-focused
Last updated Aug 09, 2026 00:00 UTC