AdvertisementHere's what to know about dengue, as Puerto Rico declares a public health emergencyMarch 27, 2024Joe HernandezfacebookEmailVictoria Micieli, director and scientist at the Center for Parasitological and Vector Studies of the national scientific research institute CONICET, classifies different species of mosquitoes at a laboratory in La Plata, in Argentina's Buenos Aires Province, on Tuesday. (AFP via Getty Images)