The interviewer referenced comments made by a professor of national security affairs who last week said he feared that ISIS fighters could use Ebola as a weapon if they infected themselves and traveled to the U.S.
"Well, it’s certainly something I’ve been thinking about ever since this Ebola outbreak started," Johnson said. "You really don’t even want to think about. You don’t even really want to talk about, but we should do everything possible to defend ourselves against that possibility because I think that is a real and present danger."
FBI Director James Comey said on Thursday there was no evidence that terrorists such as ISIL would use Ebola in biological warfare.