Has anybody tried making masks?

[dreamshark]

Official guidance on masks has been confusing to say the least.

• DON'T BUY MASKS, PEOPLE! THEY DON'T WORK (besides we need to save them all for health care workers)
• Wait, did we say they didn't work? We just meant that they only help filter outbound viruses, not inbound. If you are sick and heading for the doctor, by all means wear a mask. But they are of no help whatsoever for protecting the wearers. (Except health care workers).
• OK, actually, N-95 masks do work. But only health care professionals know how to put them on correctly, so they won't work for you.
• Surgical masks are useless  as they do not filter out viruses. And certainly those dust masks from hardware stores are useless.
• Health care workers are running out of masks and buying them in bulk from hardware stores. 
• Hospitals are desperate for masks and would like you folks to start making fabric masks at home and donating them. But we aren't going to tell you what the requirements for the masks are or what material to use. PLEASE HELP!

I understood the first 5 bullets to be a product of confusion and transparent lying on the part of the people disseminating the information, but I am nonplussed by the last one. After that cascade of warning about masks being useless unless they are exactly the right type, made of a specific virus-filtering material, and precisely fitted to the wearer, suddenly we're supposed to be sewing masks out of old t-shirts to donate to hospitals? Or alternatively, to wear ourselves when the CDC completes its official about-face on the public wearing masks and starts requiring them?

So I thought I might try making some masks. Where do I find a pattern and instructions? Okay, I know that I can find a gazillion patterns, YouTube videos, Pinterest posts, and sets of conflicting instructions online. Where do I find the right one?