Mphepo yamkuntho yamphamvu m'nyengo yachisanu, kutentha kwa chilimwe, ndi chimphepo chamkuntho Hilary zachititsa kuti udzudzu wa Aedes womwe umaluma masana ku California, wachititsa kuti m'madera ena ukhale woyamba kudwala kachilombo ka West Nile kwa zaka zambiri.
Kusefukira kwa madzi osefukira ku Western Australia kumpoto chakumadzulo kwadzetsa chiwonjezeko cha ma virus omwe angaphatikizidwe ndi udzudzu, pomwe akuluakulu azaumoyo akulimbikitsa anthu kukhala osamala.