I think some of you should know that ice nucleation is nothing new at all
https://www.google.com/search?q=ice+..._AUIBygA&dpr=1
Lloyd Kozloff was the Chairman of the Dept of Microbiology in Denver when I was there and the work continued when he moved to CA where he was Dean of the graduate school at
San Francisco.
Look at the dates to see what I mean and certain bacteriophage could do the same thing, not infectious for humans.
Carolyn