Dr. Fauci: 'We Have to Pay Much More Attention to the Animal/Human Interface'

Dr. Anthony Fauci, who plans to retire at the end of the year, told MSNBC's Rachel Maddow Monday night that we are seeing an increased threat from new and insurgent viruses, such as monkeypox, polio, SARS, Zika and others.

"There are probably a number of complex reasons why that's the case," he said.

"If you look at the outbreaks that you just enumerated a moment ago, it really follows a pattern that we've known for some time, that about 70 percent to 75 percent of all the new emerging infectious...