Hostile sentiment between which countries? The WIV was on Chinese soil, but received American funds and had many American collaborators; so I don't think either

Hostile sentiment between which countries? The WIV was on Chinese soil, but received American funds and had many American collaborators; so I don't think either country is in a great position to blame the other. On the other hand that gives China and the USA a shared interest in discouraging investigation of the cause, as seems to have occurred.