Personal Protective Equipment (PPE) such as face masks are used to protect ourselves from potential splashes of blood/body fluids / chemicals.
A surgical mask is a loose-fitting, disposable mask that’s rectangular in shape. The mask has elastic bands or ties that can be looped behind your ears or tied behind your head to hold it in place. A metal strip may be present at the top of the mask and can be pinched to fit the mask around your nose.
A properly worn three-ply surgical mask may help block transmission of large-particle microorganisms from droplets, sprays, splatters, and splashes. The mask may also reduce the likelihood of hand-to-face contact.
The following document published by the HSE outline the correct sequence for putting on and removing PPE to prevent contamination of the face, mucous membranes and clothing.
Take look at this document by clicking here.