DIY/ home-made cloth face mask to slow the spread of COVID-19

Wearing cloth mask is to prevent infected people passing on the infection, not to prevent the wearer getting infected. There is evidence that using medical-grade masks i.e. N95 masks can protect the wearer from catching the virus, in the right healthcare settings, but little to support it in the general public.

https://www.cdc.gov/coronavirus/2019-ncov/downloads/DIY-cloth-face-covering-instructions.pdf