another team of scientists led by dr. josef penninger of the university of british columbia invented a medicine called apn01. they tested apn01 in engineered human tissue. these are human cells put together to act like part of the body, but they are not a whole animal or person. they added a protein called "human recombinant soluble angiotensin converting enzyme 2" (hrsace2) and saw that it stopped the virus from taking over cells. they named their hrsace2 apn01.