Chula Research Team Produces Spray for Fabric Masks to Help Prevent COVID-19 and PM 2.5 Dust

A Chula Research Team has invented a spray, Shield+ Protecting Spray, to make fabric masks waterproof and more effective in protecting against viruses and germs. The spray is an alternative innovation to make fabric masks more useful for the public, especially at a time when surgical masks become more difficult to find.

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