If ongoing risk from those ancient pathogens were anywhere close to being real, then every year when old glacial mountain ice melts and feeds the streams on whi

If ongoing risk from those ancient pathogens were anywhere close to being real, then every year when old glacial mountain ice melts and feeds the streams on which so many areas depend, there would also be serious disease outbreaks and epidemics in those areas. But that doesn't happen. Also, the scientists who drill into ancient ice and pull out cores and handle them freely would also face similar issues. But again that doesn't happen. Another thing to keep in mind is that, even if there were surviving pathogens in that old ice, generally we are the descendants of folks who survived exposure to those pathogens at some point in the past. So it may very well be in our genes to mostly just shrug off exposure to them today.