There is no specific vaccine for the West Nile fever. In 80 percent of cases, the disease proceeds without symptoms, or almost without symptoms. Stepan Atoyan, Director General of the National Center for Disease Control and Prevention, stated this at the press conference held Wednesday at the Ministry of Health of Armenia.

"A person does not have any subjective feelings in order to seek medical help. Severe cases are accompanied by damage to the nervous system, including meningitis and encephalitis, which are observed in up to 1 percent of cases. Of the 41 [West Nile fever patients] hospitalized [in Armenia], perhaps half of them have cerebral phenomena. Intoxication phenomena are recorded in the others," Atoyan said.

According to him, there is no specific medicine for the West Nile fever, and general medical measures are implemented to improve the overall condition.

"Like all infectious diseases, this disease also has seasonality. The main season is the period from June to October, but the most active period is the period from July to August," said Atoyan.

In his words, no cases of the West Nile fever have been reported so far in Armenia's neighboring countries.

"This year, there were 440 cases in Russia and Israel, 231 cases in the US, 69 cases in Eastern Europe," added the director general of the National Center for Disease Control and Prevention.