New variants of coronavirus could “become fully resistant to current vaccines or past infection,” Tedros Adhanom Ghebreyesus, the head of the World Health Organization, said Wednesday as he voiced concern about the spread of omicron and delta variants causing a “tsunami” of new COVID-19 cases. READ MORE: https://www.forbes.com/sites/lisakim/2021/12/29/new-variants-could-be-fully-resistant-against-current-vaccines-or-previous-infection-who-director-says/?utm_campaign=forbes&utm_source=twitter&utm_medium=social&utm_term=Gordie&sh=2071cabc4854 Stay Connected Forbes on Facebook: http://fb.com/forbes Forbes Video on Twitter: http://www.twitter.com/forbes Forbes Video on Instagram: http://instagram.com/forbes More From Forbes: http://forbes.com