Does that automatically disqualify the hard data and references? Masks prevent spittle, in which the virus survives longer than single escaping  airborne virus, so he can make some claim about masks help a little. If you aren't sick, you aren't coughing and sneezing making spittle so no need for a mask. The fear mongering line looked like an appeasement to the publishers/medical community so they don't screw him. I posted this for his reference materials, not his one line of professional disclaimer in case someone wants to sue him or get his license revoked just to shut him down.