The joys of the doctor's clinic queue

I paid a visit to the doctor today but was told I had to wear a face mask on order to get seen.   I told the receptionist I was not unwell and therefore posed no danger to anyone.   She told me all patients must wear a mask to which I replied that surely only those who have some sort of communicable respiratory problem should cover up?  She paused to think through my logic and then replied but it's best to wear one as they do not work.  Yep, I was being told to wear a paper face mask because they do not work...