Dr Rochelle Walensky, Director of the US Centres for Disease Control and Prevention, left, and Dr. Anthony Fauci, top US infectious disease expert, testify before a US Senate committee hearing to examine the federal response to Covid-19 and new emerging variants. AP
Dr Rochelle Walensky, Director of the US Centres for Disease Control and Prevention, left, and Dr. Anthony Fauci, top US infectious disease expert, testify before a US Senate committee hearing to exaShow more