The adapted masks are not certified for biomedical use and patients must sign a waiver before making use of them.
However, hospital staff in various countries are also understood to have been turning to full-face snorkelling masks for their own protection. where there is a shortage of visors and goggles.
Meanwhile in Italy dive-equipment manufacturer Mares has taken up the idea and is donating 5000 of its Sea Vu Dry full-face snorkelling masks for the fight against coronavirus.
The masks are being delivered to hospitals initially in northern Italy for application both using the newly developed 3D-printed valve that allows them to be attached to ventilators, and as protective visors for medical staff.