biological warfare
biowarfare

Even worse, they've started using some kind of biological warfare against us.

A guide to the science and history of biological warfare.

But it is in the 20th century that biological warfare became an industry.

"These were clearly agents that could be used for biological warfare."

But no such considerations stood in the way of biological warfare.

And were the aliens designed as a form of biological warfare?

But it is important to keep the risk of chemical or biological warfare in perspective.

This is used for protection against nuclear, biological and chemical warfare.

There is also a short history of American involvement with biological and chemical warfare.

This is biological warfare and we are on the side of the trees.