DIM1HEALTH (www.dim1health.com/en/) is a grant supported by Région île de France. DIM1HEALTH contribute to help research project on infectious diseases. The grant is based on three areas – environmental health, human health and animal health – whose close interactions make them inseparable from each other. The “One Health” concept came into being in a context of emerging infectious diseases worldwide in the early 2000s. COVID 19 is now a new example to illustrate the concept “one world one health”. On the 3rd November 2020