 Xigashada Sawirka, Denise ApplewhitePrinceton University Qoraalka sawirka, John Horton Conway waxaa uu u geeriyooday xannuunka Covid-19 Suaasha lais weydinaya waxay tahay, sida ay ugu suurogashay in gabdhan dhawaan kasoo qalin jebisay jaamacadda inay xal u hesho xisaabtan caanka ah ee la dhaqaajin waayay? 