health acknowledged it funded research of a virus studied at the wuhan institute of virology. the experiment unexpectedly, we're told, made a bad coronavirus more contagious than the original naturally occurring one. but we're also told this was not covid-19. dr. fauci says it's, quote, molecularly impossible that the virus, which has killed almost 5 million people worldwide, was the same one funded by the nih. cnn's kristen holmes breaks down now all of this debate that started between a fiery exchange between senator rand paul and dr. fauci which also then led to the nih disclosure. >> a new letter raising questions about experiments in a wuhan lab and sparking republican outrage. for years the national institutes of health provided grant money to the ecohealth alliance research group, which conducted experiments with bat coronaviruses in wuhan, china. republicans have claimed the federally funded research could have started the coronavirus