Yes, that caught my eye. Not sure I would be good at making a homemade mask, but necessity causes a lot of preconceived notions to be re-thought.
It is also clear that home-made masks such as teacloths may still confer a significant degree of protection, albeit less strong than surgical masks or FFP2 masks. Home made masks however would not suffer from limited supplies, and would not need additional resources to provide at large scale. Home made masks, and to a lesser degree surgical masks, are unlikely to confer much protection against transmission of small particles like droplet nuclei, but as the reproduction number of influenza may not be very high [14] a small reduction in transmissibility of the virus may be sufficient for reducing the reproduction number to a value smaller than 1 and thus extinguishing the epidemic
Translation - better than nothing. We don't own any tea cloths. I would think something with a high thread count and/or thick or multiple layers would make a difference. Especially multiple layers or pleated to create multiple layers would be decent. Just need a sewing pattern.
I think we ought to find or come up with a design, sewing pattern.