The Dutch CoronaMelder app and its equivalents in other countries are used in around one in twenty-five COVID-19 cases. This has been shown by research
Daan Marselis (1983) has been working as a freelance journalist since the autumn of 2010. His work was published by the Dutch Journal of Medicine (‘Nederlands Tijdschrift voor Geneeskunde’), Trouw, de Volkskrant, de Correspondent, CNN, Vrij Nederland and several professional journals for health care executives. Marselis is currently working as a producer for Dutch radio station BNR Nieuwsradio. In December 2018, he joined The Investigative Desk, where he specialises in researching and writing about the pharmaceutical and health care industries.