The novel coronavirus mutation that appeared in England in mid-December has not yet been detected in the Czech Republic so far, Barbora Mackova, head of the National Health Institute's (SZU) centre of epidemiology and microbiology, told CTK Thursday. The increasingly contagious mutation has appeared in Germany, France, the US, Canada, Japan, Australia, and the United Arab Emirates. Studies have shown it does not cause a more serious course of the disease. In reaction to the detection of the new coronavirus strain, the Czech Republic halted flight arrivals from Britain on Dec. 21, and introduced compulsory home quarantine for people arriving from the UK as of Dec. 20. Direct flights from London to Prague were restored Dec. 23 with the passengers required to submit a negative COVID-19 test.