Dad has a nurse that comes and helps with some IV transfusion stuff he's getting. She was telling him already how there's an underground network growing for certificates and medical exemptions though they're becoming irrelevant. She stated her friend went traveling and has said certificate. Evidently she attempted to board, they took her temp and claimed that there was an issue and needed to try again. Apparently one of the people there said "we know that you know that you have not had the vx. We'll let you pass, but you need to get this sorted out." Nurse asked one of her specialists and they also confirmed there are some sort of tracing aspects to this.