What You Need to Know Before Making a Coronavirus Mask
By Susan L. Sokolowski and Karen L. LaBat, The Conversation
The recent Centers for Disease Control and Prevention recommendation to use cloth face coverings to help slow the spread of COVID-19 has generated numerous how-to articles and videos. As academics who focus on personal protective equipment (PPE) research and development, we are concerned about the lack of information about two critical features of home mask design: fit and fabric selection.
Virus particles are tiny, ranging from 0.1 to 0.3 micron. A size 40 micron particle is visible with the naked eye—anything smaller, you need specialized equipment to see it.