COVID-19 Outbreak (Update: More than 2.9M cases and 132,313 deaths in US)

Meta analysis of mask effectiveness. Didn't appear to help much against viruses. From 2017 but very robust.

https://academic.oup.com/cid/article/65/11/1934/4068747
"There was no significant difference between N95 respirators and medical masks in protecting HCWs from SARS (OR = 0.86; 95% CI: 0.22–3.33), with corresponding RRs of 0.88 (95% CI: 0.26–2.27) and 0.94 (95% CI: 0.41–1.34) under baseline risks of 20% and 60%, respectively..."

If this is what they found do we really expect homemade cloth masks to be better?

This is still prevention from getting sick and not the other way around though.
So in these studies, are they looking at just the HCWs wearing the masks? I thought the whole thing with everyone wearing masks was not to protect yourself, but to protect others? I just find it hard to believe that if everyone is wearing a mask of some sort it doesn't have an effect on transmission rates.