Situation report, surveillance and control in 2021
The presence of the tiger mosquito in the Valais is currently limited to the town of Monthey. The results of the monitoring and control program have not revealed any new entry of the tiger mosquito on the Valais territory in 2020. In Monthey, its area of propagation has expanded since the discovery of a first specimen in 2019. The monitoring and control measures already in place in Monthey will be renewed and intensified in 2021. The population is invited to participate in the monitoring and control of the spread of the tiger mosquito by avoiding temporary water accumulations as much as possible and by reporting any suspicious case.