Rapid antigen tests Lots of information above, but I have a different question, in the hierarchy of controls where does RAT's sit, having some interesting discussions with our workers who see this an an engineering control or isolation, where as I see it as a health monitoring tool which is more at the admin level, have seen some literature that people see vaccinations as elimination which once again we see it as an engineering control, would love to know your thoughts and expert opinions before we launch into our final COVID risk assessment consultation process with our workers.