Well this is a potential side-effect of global climate change/warming that I had never considered... And I don't know this for sure, but off the cuff, I'm betting neither have 7,999,999,000 or so of the 8 billion people on the planet.
And I'm not talking about the Godzilla-esque viruses, but the possibly dormant but not dead strains of smallpox, etc.
Great illustration though - we may not have eradicated any viruses on the planet - just on the surface. (Paraphrase the article.)