Grey heron infected with West Nile virus A grey heron in the Noord-Holland-Noord region has tested positive for the West Nile virus. The virus is rare in the Netherlands. Bas van de Meulengraaf
Lyme disease cases have quadrupled According to a survey by RIVM , 27,000 people were infected with Lyme disease in 2017. In 2014, the last time RIVM reported on the incidence of tick-borne disease, this number was 25,000.