[[Two people are standing facing each other, having a conversation. One is holding a laptop.]]
Person #1 (with laptop): What's the deal with this leukemia trial? {{Citation: Nejm, Aug 10, 2011}}
Person #2: Gotta wait and see.
Person #2: Helping the immune system attack tumors has been a longtime research target.
Person #2: Lots of promising leads. Often they don't pan out.

Person #1: What'd these guys do?
Person #2: They took some of the patient's T-cells and patched their genes so they'd attack the cancer. That hasn't been enough in the past but their patch also added code to get the T-cells to replicate wildly and persist in the body.

Person #1: Which worked, but created its own set of problems?
Person #2: How'd you guess? But I think the craziest part is the way they insert the patched genes.
Person #1: How?
Person #2: Well, think - What specializes in invading and modifying T-cells?
Person #1: Seriously?
Person #2: Yup. Must've been a fun conversation.

[[The last panel is set in a doctors office. A patient is sitting on the observation bed talking to their doctor.]]
Patient: Ok, so I have blood cells growing out of control, so you're going to give me different blood cells that *also* grow out of control?
Doctor: Yes, but it's ok, because we've treated *this* blood with HIV!
Patient: Are you sure you're a doctor?
Doctor: Almost definitely.

{{Title text: 'We're not sure how to wipe out the chimeral T-cells after they've destroyed the cancer. Though I do have this vial of smallpox ...'}}