Precisely 255 people entered Thailand during the November 15-27 period from eight at-risk southern African countries – Botswana, Eswatini, Lesotho, Malawi, Mozambique, Namibia, Zimbabwe and South Africa – with three having left and 252 still in Thailand. Of these, only 11 have been contacted for screening of the worrying Omicron variant, Centre for Covid-19 Situation Administration (CCSA) spokesperson Dr Taweesin Visanuyothin said on Wednesday.