Yep : cloth does dramatically lower spread. It catches a majority of your own crap. It does offer little protection to yourself. That's why most everyone should wear one.
@ParksideRes : not according to Dr Fauci
"Fauci: …There's no reason to be walking around with a mask. When you're in the middle of an outbreak, wearing a mask might make people feel a little bit better and it might even block a droplet, but it's not providing the perfect protection that people think that it is. And, often, there are unintended consequences - people keep fiddling with the mask and they keep touching their face."