A leading epidemiologist says thousands of people" will be quarantined in isolation facilities for months - and possibly years - into the future. University of Otago professor of public health Michael Baker's appearance on Newshub Nation on Saturday comes after multiple cases of people breaking out of their facilities. Prof Baker says ... we need to be prepared for a "long-term risk management challenge". "Mistakes happen, and we have to learn from them and improve our systems so we don't repeat those errors," he [said]. "We're going to have thousands of people sitting in these facilities, quarantined in isolation facilities for months, maybe years ahead." The latest escapee, a person in their 60s, broke the window of the Waipuna Hotel in Auckland on Friday and climbed out of the building. Their escape is the fourth since last Saturday, when a woman scaled two fences to escape from Auckland's Pullman Hotel. On Tuesday, a 32-year-old man snuck through a gap in the Stamford Plaza fencing and visited an inner-city supermarket. Prof Baker says we need to look at why these people feel the need to escape from the isolation facilities. ACT leader David Seymour said the Government needs to start profiling travelers based on their risk of absconding. "The vast majority of people entering New Zealand will pose absolutely no risk of absconding from managed isolation and quarantine facilities," he said in a statement. "But a tiny minority will be a risk. The Government should ... place them under tighter security."