All and all, the data we have is still relatively new and mixed across the board. Because of obvious ethical considerations, in many cases, you can't create hig

All and all, the data we have is still relatively new and mixed across the board. Because of obvious ethical considerations, in many cases, you can't create highly controlled studies and have to rely on retrospective data collection from situations with poor information, censored data, and a host of other issues. When you get a situation that resembles something you might create in a controlled study (like this hair shop mask situation), you latch on to see if you can find some insight. It may be poor data and a small sample but it can give guidance for how these highly complex macroscopic situations play out.