"A more recent discovery is that they were killed to an even greater degree by a Hanta virus native to the Americas."
Quite a lengthy thread on this topic, on FR, in fact.
I was quite surprised to see the hanta virus thing since the 85% to 95% death rates were expressed in a New England setting in the 1640s through a combination of smallpox, mumps, measles and what was probably influenza.
There were no Spaniards around to kill the Indians in that location of course ~ just whole big bunches of Englishmen!
Given all this information it's simply amazing we still have people walking around with this "Spaniards killed 'em" idea.