[Does Rift Valley fever threaten "encroachment" into the southern regions of the USSR?].
D000818:Animals; D004196:Disease Outbreaks / Q000662:veterinary; D006801:Humans; D012295:Rift Valley Fever / Q000453:epidemiology* / Q000635:transmission; D014586:USSR / Q000453:epidemiology
Ugrozhaet li likhorada doliny Rift "vtorzheniem" v iuzhnye raĭony SSSR?