Hepatitis D is the only bloodborne pathogen to which we are susceptible.

And the lymphatic system is the stuff in your blood that fights diseases.

I don't know what to say exactly... but you've known all along how precarious this type of leukemia is.

They're an integral part of the food web, eating flies, ticks, mosquitoes, and other disease vectors, thus, protecting us against malaria, dengue fever, and other illnesses.

They took a sample of my blood at the hospital.

One is the Inferior and the other is the Superior, meaning lower and upper, and they both are called Vena Cava.

I propose to you any disease a rat could spread, a squirrel could equally carry.

Imagine the blood flowing through your body

Blood circulates through the body.

Parametric Plot

The Red Cross supplied the hospital with blood.

I think most of us know what the heart does in our body.

So now blood is gonna go through the aorta to the rest of the body.

But there's only five in the human body.

Destroy the pathogens

The pathogens can't reach us.

Rats spread disease. They bite people.

The contagion required cerebral spinal fluid... as a catalyst.

And the story of the Intermittent Absorption Refrigerator.

There are no medicines.

And so we've been studying people like this individual.

Royal blood.

Let me start there. For the systemic circulation, I'm gonna start in the left ventricle and it's gonna go round to the body.

They attack like white blood cells fighting an infection.

Malaria is carried by mosquitoes.

Impure drinking water can be a carrier of diseases.

Cedars Sinai, where that night I receive, because of my internal bleeding, 45 units of blood which means full replacements of all the blood in me before they're able to staunch the flow.

Acid for blood.

Something in the blood.

What blood?

Human beings are a disease.

It's about an extraterrestrial disease.

The doctor identified the pathogen.

This is highly thrombogenic material. Thrombogenic, very fancy word.

I trust him. Who are you and what have you done with Vicki Nelson?

I need a CBC with platelets and a complete chem screen and CK.

HlV is actually not that easy to transmit sexually.

Pathogens detected in the central core. T'Pol!

Strain of what?

The cycle of blood is not regular.

What is your blood type?

What's your blood type?

No, it's dark in here.

47,905 blood samples.

My blood test.