Blind spots thwart global coronavirus tracking
Science's COVID-19 reporting is supported by the Heising-Simons Foundation Testing for COVID-19 at Johannesburg's airport in January. A variant of concern that arose in South Africa has spread around the world. PHOTO: GUILLEM SARTORIO/BLOOMBERG/GETTY IMAGES Last month, Gytis Dudas was tracking a concerning new coronavirus variant that had triggered an outbreak of COVID-19 in his native Lithuania and appeared sporadically elsewhere in Europe and in the United States. Exploring an international database of coronavirus genomes, Dudas found a crucial clue: One sample of the new SARS-CoV-2 variant...