To its credit, MLS has been transparent about its programs and protocols. MLS personnel inside the bubble are tested every other day. If an individual tests positive, they are promptly put in isolation until they are cleared by a medical professional. Contact tracing is then done to see who else might be at risk, with more people put in quarantine."As long as you have systems in place for testing and isolating people with cases so that the disease does not spread, then I think you're doing the right thing," said Sandro Galea, an epidemiologist and dean at the Boston University School of Public Health.