Fig. 1.

a Answers rate at the question “How long do you use a surgical mask before changing it?”; b Answers rate at the question “When you are not wearing your mask or FFP, where do you usually put it?”; c Answers rate at the question “After you use a mask or FFP, how do you wash or disinfect it?”; d Answers rate at the question “In your opinion, do you believe that the use of masks or FFP represents a useful tool to prevent the spread of COVID-19?”