The World Health organization WHO warned that bank notes may transfer the Virus Covid 19 as this virus stay longer on surface longer then most virus. Quoting WHO spokes man.

"The primary transmission route is via droplets,” says Prof Jürgen Haas, the head of infection medicine at the University of Edinburgh. “These droplets are generated by coughing, and can directly infect another person via airborne infection, or by transmission via hands or other surfaces."

Banknotes can carry the coronavirus. But try not to be too alarmed: the risk is small. “Unless someone is using a bank note to sneeze in,” Tait-Burkard says. Don’t worry too much about loose change. “Coins are actually very bad environments for viruses to survive,” she says.