Endemic
The continual, low-level and low-frequency presence of disease in a community or an infectious agent within a given geographic region or population (human, animal or plant).
Glossary Source
JRC EU CBRNe Glossary
(
EU Glossary on Chemical, Biological, Radiological, Nuclear, and Explosive risks
)
https://publications.jrc.ec.europa.eu/repository/bitstream/JRC128863/JRC128863_01.pdf