Billions of viruses rain down on Earth every day: Study

A scientific study has added a new vector to the usual transportation of viruses and bacteria horizontally from person-to-person: they now can literally fall on you from above.
Every day, more than 800 million viruses fall from the atmosphere and are deposited per square metre at a height of 2,500-3,000 m, the study found. That works out to about 25 viruses for every person in Canada, according to Curtis Suttle, a virologist at the University of B.C. and one of the senior authors of the paper.
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