When I first read this comment my immediate reaction was that it was probably baseless fearmongering. After a bit of googling, I feel more ambivalent.

1. It’s illegal to sell cancerous animal meat.

2. Even if a cancer was capable of living in a human host, cooking and digesting it should neutralize it.

3. Cancer is generally not considered to be contagious, but there are specific cases where cancers actually can move from one host to another. Tasmanian devils spread facial tumors to one another by fighting and exchanging fluids. A lab worker got a tumor in her hand after accidentally injecting herself with colon cancer cells. Cancer can spread during organ transplants.

I wouldn’t be at all worried about catching cancer from eating lab-grown meat. But I do wonder about some edge cases, like what if you cut yourself while you were chopping the raw meat and it got in your bloodstream? That sounds kind of like the case with the Tasmanian devils, or the injected colon cancer. However, I’m not sure if there’s any known case of a tumor from one species spreading to another.

Anyway, this sounds more like a freak event than a pandemic. We’d probably figure it out if it happened to a decent number of people, it’s not like we’d realize after 50 years that millions have died that way. The downside risk doesn’t seem so great that we should avoid developing lab-grown meat. There’s probably a lot of things in your kitchen that could kill you if injected into your bloodstream.

Also, the parent comment was flagged. I don’t find it to be rule-violating, so I vouched for it.