The cult Aum Shinrikyo is infamous for its deadly chemical weapons attacks on metropolitan Tokyo in the 1990s. Less well known is the ambitious biological weapons program that preceded the group’s ...

The CDC and NIAID, in conjunction with the U.S. Department of Homeland Security, evaluate the potential threat from various microorganisms and toxins and classify them into three categories. Category ...

There has been a lot of speculation about whether Covid-19 was a naturally occurring disease. Here, biodefense expert Dr. Mark Kortepeter explains what scientists look for in determining whether a ...