The European Union should consider immediately scaling up genomic sequencing of COVID-19 infections and monitoring of waste water, including from airports, to detect any new variants given the virus surge in China, the bloc's health chief said. In a letter to health ministers of the EU's 27 members, Stella Kyriakides said the bloc should be "very vigilant" as China lifted travel restrictions on Jan. 8 as reliable epidemiological and testing data for China were quite scarce.