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John Cunningham Virus, also known as progressive multifocal leukoencephalopathy (PML)

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Human Polyomavirus

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Symptoms come on quickly and worsen over time
- Clumsiness
- Changes in personality
- Trouble Speaking
- Vision Problems

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There is no way to prevent the virus; however, normal bodily functions should fight it off.

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-People with a weakened immune system
-People who take drugs that weaken their immune system
-HIV/AIDS patients are most at risk
-Those with Hodgkin's disease, leukemia, and lymphoma are also at risk
- Acquired through contact with contaminated urine

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- This virus has no cure
- Patients who take immune system weakening drugs have to stop taking them
- If caught fast enough, some treatments may reduce the risk of long-term complications

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- Tests can detect if you carry the PML virus
- A doctor will take a sample of the patients tissue under a microscope to check the blood for signs that your body is fighting off the infection.

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- The virus can cause brain infection called progressive multifocal leukoencephalopathy.
- This damages the outer coating of the nerve cells which can cause permanent disabilities and can be fatal

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- When the virus is in the kidneys, it can come out along with urine and be spread to others who come in contact with it.
- Once the virus is in someone's body, it stays and is dormant, something must reactivate the virus for that person to become sick.

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https://www.verywellhealth.com/an-overview-of-john-cunningham-virus-4688570#causes
https://www.webmd.com/brain/jc-virus#2-7