米CDC｢家で靴を脱がない国は感染者数も死亡率も高い。アメリカ人よ靴を脱げ ドイツカナダ中国を見習え｣

In a new study published in one of the Centers for Disease Control and Prevention’s journals,
Emerging Infectious Diseases, researchers tested air and surface samples at a hospital
in Wuhan, China, where the coronavirus outbreak initiated. The researchers found that about half
of health-care professionals working in intensive care units carried the coronavirus
on the soles of their shoes. Further, the report showed that there was a 100% positive rate
from the floor of the pharmacy, where only health-care workers traveled, not infected patients.
https://www.yahoo.com/lifestyle/coronavirus-spread-soles-shoes-according-155240105.html