FFP3 compared to FFP1 & 2 have the maximum inwards leakage on average of 2% and are ideal for not catching something not to be worn (ideally) by surgeons or contagious patients. FFP3 also have the most resistance to breathing, so if you are contagious then not ideal to wear a FFP3 due to the causes of the infection on inhaling.
" Note: Because the P3 has an exhalation valve, it is not for use by infected patients or by professionals in the operating theatre".
Regardless of FFP1/2 or 3 working in customers offices, care homes and doctors surgeries I and my staff would rather have something than nothing at the moment... We use FFP3 by the way.
