patient zero"."We may never find who the patient zero was," said Maria Van Kerkhove, World Health Organization's technical lead on the infection.A WHO-led team investigating the origins of COVID-19 is to hold virtual meetings with its Chinese hosts in Wuhan, where the pandemic first emerged more than a year ago.WHO on combating new variants of Covid-19The WHO's emergency committee called Friday for globally-ramped up coronavirus sequencing studies in order to combat troubling new variants stalking the globe.The meeting was dragged forward by two weeks for urgent talks on the emerging, seemingly more contagious strains of the virus, as the death toll from the Covid-19 pandemic topped two million, according to an AFP count.The emergency.