A new coronavirus variant B.1.1.7 is found in UK. The mutations of this strain is complex. The UK B.1.1.7 variant, South Africa 501.v2 variant, and the Brazil E484K variants may make the vaccines ineffective. This variants are considered as alarming one. This post explain the 23 mutations of this new variant. This variant might be more contagious than other variants, but there are also some uncertainties and misinformation.