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Once exposed to methylene blue, the solution, when exposed to bright light, continues to inactivate the coronavirus days.
A small amount of methylene blue, with a large dose of sunlight or bright light, is all that’s needed to inactivate the coronavirus on N95 masks. These are the gold standard for masks among health-care workers. This method also works on some other personal protection equipment, or PPE, so needed by medical workers, a new study released December 11 concluded.
The findings were part of a 6-month-long DeMaND study (Development of Methods for Mask and N95 Decontamination), which involves researchers from the Centers for Disease Control and Prevention, from the World Health Organization, and from 12 institutions, including the University of Washington School of Medicine and Seattle Children’s Research Institute.