WHO suggestions mandate that sterility test isolators go through complete revalidation at the least on a yearly basis, or more commonly if significant improvements or upkeep activities have happened. The idea of sterility assurance extends further than the physical components from the isolator to encompass the entire testing system. https://www.tumblr.com/tailinscitech/805881091208724480/applications-and-benefits-of-tailin-containment?source=share