A strange disease in Vietnam may turn out to be a new strain of COVID. Russian tourists in Nha Trang complain en masse of fever, cough, headaches and runny nose. However, the exact cause of the disease has not yet been determined. Possible causes may include a new infection with the coronavirus, its strain, or a mycoplasma infection, Andrey Osipov, chief physician of Domodedovo Hospital, told Zvezdanews. "The reason is that tests are simply not performed, studies, including PCR, are not performed. Because of this, an accurate diagnosis is not established, and antiviral agents and conventional symptoms are used," concluded the expert. Rospotrabendzor stated that they are monitoring the situation with Russian tourists who are sick with the flu. The agency requested information from the country's Ministry of Health about the epidemiological situation.