Here is why.
MOSCOW, May 22 (Reuters) - Russia on Friday confirmed its first case of H1N1 flu in a traveller who recently returned from the United States, Interfax news agency quoted a public health official as saying.
Tests showed a Russian who had returned from New York had the H1N1 virus, Gennady Onishchenko, head of the state consumer protection watchdog, was quoted as saying.
"Tests showed positive and he has been hospitalised," said Onishchenko. "He is feeling okay and his condition is satisfactory."
"Everyone who had contact with the patient has been put under observation."
The consumer protection watchdog, known as Rospotrebnadzor, declined to make immediate comment. (Reporting by Guy Faulconbridge; editing by Dmitry Zhdannikov)