The first mosquitoes carrying Wolbachia, bacteria that prevent them from transmitting arboviruses (including dengue, Zika and chikungunya), were released on Wednesday July 10, 2019 in Nouméa, New Caledonia, as part of the World Mosquito Program,* which involves teams from the Institut Pasteur de Nouvelle-Calédonie. The aim of this program is to encourage mosquitoes infected with Wolbachia to breed with wild mosquitoes, resulting in a population of Aedes aegypti mosquitoes that are unable to transmit arboviruses.