A Seattle startup, led by doctors, has just earned FDA approval for a groundbreaking surgical mask that kills viruses on contact. These masks use Oxafence, a technology powered by methylene blue ...

Singletto is marketing a methylene blue product called Oxafence Active ... the largest wholly domestic surgical mask maker in the U.S., to manufacture Oxafence-containing masks.

Dr Kelly Fearnley said she was given just a blue surgical mask for work in a Covid ward Two West Yorkshire medics left with long Covid after working on the pandemic front line have said their ...