GENEVA (AP) - Advisers to the World Health Organization are holding a special session Friday to flesh out information about a worrying new variant of the coronavirus that has been detected in South Africa, though a top expert says its impact on COVID-19 vaccines may not be known for weeks.The technical advisory group on the evolution of COVID-19 was meeting virtually to discuss the so-called B.1.1.529 variant that has caused stock markets to swoon and led the European Union to recommend a pause in flights to southern Africa.The World Health Organization’s COVID-19 Technical Lead urged people to take steps to reduce transmission and get vaccinated on Thursday, November 25, following the discovery of a new variant of the virus in South.