Oak processionary posed a health threat. In April 2018, an outbreak of the caterpillars was reported across Greater London and surrounding areas. The moth is now fairly common in Belgium, notably in the Campine but also elsewhere, with fluctuating population numbers from year to year. In 2007 infestations in the Belgian province of Limburg were so acute that soldiers were deployed to burn them. In the Netherlands, the caterpillars are dealt with by biological pest control. Local authorities use, like in Germany, fluids containing bacteria that are toxic only to the caterpillars. These fluids are sprayed onto the infected trees. Furthermore, an
Canadian Science Centre for Human and Animal Health the only facility in Canada operating Containment Level 4 (CL4) laboratories and is believed to be the first in the world to have both human and animal Level 4 laboratories under one roof. Level 4 laboratories are designed to allow scientists to safely handle the most serious infectious agents. Their design, construction, and engineering controls safeguard against the release of any infectious material. Both NML and NCFAD operate critical diagnostic testing programs relied on across the country. These programs protect human health, animal health, and international trade. Staff also undertake cutting-edge research to advance scientific knowledge, improve diagnostics and develop