Rift Valley fever (RVF) is a mosquito-borne viral disease
which manifested itself during recent epidemics and revealed its
significant potential of emergence. Studies on molecular
epidemiology undertaken to better understand the factors leading
to RVF emergence, have confirmed the mode of circulation of the
virus and highlithted probable risks and obstacles for prevention
and control. As for several other viral agents, molecular
epidemiology is becoming a useful tool in the study of the
emergence of RVF as a serious infectious disease.