Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) – The latest research shows Ebola is mutating as it infects humans, and as the virus mutates, it becomes less perceptible to the tests for it.
"I think of Ebola as an act of nature. It's the biological equivalent of a tsunami," author Richard Preston said in an interview with CNN's "The Lead with Jake Tapper." Preston, author of "The Hot Zone" writes about the virus's rapid mutations in "The Ebola Wars," an article in the latest edition of The New Yorker.
"This outbreak of Ebola – which is no longer an outbreak, it's now really a classical epidemic – seems to have, in effect, come out of nowhere. The virus exploited conditions in the human species in order to be able to move much more rapidly than it has done in the past," said Preston.
For more of our interview with The New Yorker's Richard Preston, check out the video above.