There is a high possibility of flu epidemic in many Russian regions in second half of February. This was announced by director of St. Petersburg Scientific-Research Institute Oleg Kiselev. He also informed that threshold of flu disease has not been exceeded in any Russian region yet. Flu epidemic is hard to predict. Press-service of Russian Consumer`s Inspection informed that growth of flu and acute respiratory virus infection has been registered in Russia, but it is hard to talk about epidemic.