Can Humans Give Coronavirus to Bats, and Other Wildlife?
Researchers are asking whether the virus can move back from people into wild animal populations — and what that would mean for the species involved.
As the pandemic entered its second year, a quieter question began circulating among wildlife biologists: not where the virus came from, but where it might go next. Several agencies have paused hands-on fieldwork with certain species while the risk is assessed.
The distinction matters, because a virus that establishes itself in a wild population becomes almost impossible to remove.
Risk assessments published this year put the probability of human-to-bat transmission during routine fieldwork as low, but not negligible — a judgment that rests on assumptions about contact rates that are themselves poorly measured.
For species already under pressure from white-nose syndrome, even a modest additional mortality could matter. That is the argument for caution, and it is doing more work in the current guidance than the transmission evidence itself.
Researchers who spoke for this article were careful to separate the two questions. One is whether infection is biologically possible; the other is whether it happens often enough, in the wild, to establish a reservoir. The first has partial answers. The second does not.