Bi, Kaiming; Jose Luis Herreera-Diestra; Yuan Bai; Zhanqwei Du; Lin Wang; Graham Gibson; Maureen Johnson-Leon; Spencer J. Fox and Lauren Ancel Meyers
We estimated the probability of undetected emergence of the SARS-CoV-2 Omicron variant in 25 low and middle -income countries (LMICs) prior to December 5, 2021. In nine countries, the risk exceeds 50 %; in Turkey, Pakistan and the Philippines, it exceeds 99 %. Risks are generally lower in the Americas than Europe or Asia.