A software programmer is admitted to a hospital and begins to show a strange symptom... speaking only in computer code! His wife fears he has gone insane when doctors discover that he has the most dangerous parasite in the world!

Boil-like legions lead to a diagnosis of lung cancer, just in time for Christmas. But during surgery, doctors are surprised to find a different sort of infection.

After being born several weeks premature, baby Lillian's development takes a dangerous turn when she begins to suffer from seizures.

A college student gets an oozing rash that grows rapidly! He thinks it is a staph infection but when it grows to cover most of his arm, he knows something worse is going on!

When medicine fails to stop the Cytomegalovirus inside baby Lillian's brain, her parents are forced to make an agonizing decision that could mean life or death for their daugther.

Tara keeps feeling stabbing pains in her scalp, so she investigates the Internet for answers. What she finds is almost unbelievable - botflies. She decides to cut open her scalp.

A seemingly harmless cat scratch leads to a rash that feels "alive"! A dermatologist confirms that the rash is really a case of hookworm and if it isn't stopped soon, it could turn deadly!

A trip through South America takes a deadly detour when Adam develops a wound on the side of his face. See how an insect bite developed into Leishmaniasis.

After suffering from seizures, Dawn discovers she has a pork tapeworm in her brain. To make matters worse, the only way to remove it will be to undergo brain surgery while AWAKE.

What started as a strained back turned into something more sinister for Jeremiah. Take a closer look at the symptoms of rat bite fever.

Holistic doctor Tom has been reluctant to see an ER physician about his growing rash. It isn't until he wakes up to a horrifying discovery that his girlfriend, Dee, forces him to take action.

After it is discovered that 8-year-old Jade has a toxocara parasite living behind her eyeball, doctors are forced to perform risky surgery.

When a fifteen-year-old girl develops symptoms of mood swings, headaches, fainting and seizures, her doctors must rush to find the cause. However, it's only after she passes that the true source of the infection is found.

After increasingly worse symptoms with her vision, this patient discovers there’s something in her eye and it’s not dirt.

Suffering from flu-like symptoms, a pregnant woman rushes to the hospital for treatment. After battling a secondary lung infection, she awakens from a coma & meets her 2-month-old son who was born prematurely to save both their lives.

Bizarre white growths in this man’s hand end up being barnacles! But how did they get there?