But the unknown risk on new policies is presenting the greatest worry to the industry, he said.

Or do you continue it, trading your new found well-being for unknown long-term risks?

"But for the time being, it's a bit of an unknown risk."

At unknown risk to herself and the creatures, she'd done that.

A. Yes, and this implies there are some unknown risks.

We are constantly struggling with the element of unknown risk.

It is high-risk and there are unknown risks which lie ahead.

He added, "They were doing experiments of unknown risk on people who potentially had a full, long life ahead of them."

An unknown risk is new and unknown to science.

There wouldn't be any sense in running any unknown risks.