1) studies are about pre-symptomatic.
No, they’re not. The guidelines are about whether healthy people in an infected population should wear masks to prevent presymptomatic spread of the flu. Because presymptomatic spread of the flu is exceedingly rare, that wouldn’t apply to COVID (of which it’s very common). The guidelines are *not* about the efficacy of face masks in preventing transmission. The guidelines specifically show that masks *are* presumed to prevent transmission in infected persons.
2) the sure do indicate.
Umm.. no, they don’t. Have you read them? Or TLDR?
And no, it's far less deadly than the flu, you're insane to say such numbers, infections rates are higher, fatality rate is tiny, mortality rate is so high, simply because of the insane amount of cases, namely because of the ineffectiveness of all the measures attempted to prevent it.
Aha. It’s far less deadly than the flu? Since you’re a fan of the CDC, what if I told you that according to the CDC’s latest estimates COVID has a death rate approximately 16 times that of the flu? Also, every single person ever. If you’re going down that path you’ll need to quote a source too since every single source I’ve seen (oh, also the people I know who’ve died) shows it to be at least 10 times as deadly.
Even on the ridiculous hypothetical that all those tens of thousands of NYers who died really fell off ladders and motorcycles, why does it matter if it’s due to spread or fatality rate? By stopping the spread we could still cause that much less death, wouldn’t we? And as I’ve clearly shown up thread has happened in most countries, it’s quite possible to slow the spread down to a trickle by being careful (like wearing masks). So again: where did you see a study that shows that masks do not prevent the spread of the virus?
3)no? Not sure what else to say when you make your own conclusions.
https://www.news-medical.net/amp/news/20200315/Reusing-masks-may-increase-your-risk-of-coronavirus-infection-expert-says.aspx?
The link of 70 studies, are all clearly a bunch of quacks, no real study was completed, there are plenty old ones saying how bad they are.
If you look back, you'll see with Sars, during the outbreak the world was screaming masks, but once it died down and the real studies presented true data, they all concluded, masks usage would not have helped.
Yeah, so again, I’ve asked for one source that masks don’t prevent transmission, which you still haven’t shown. As has been the pattern with links you post, that media report (again, not an actual doctor) agrees that masks would help slow transmission, but says there are other potential negative consequences (which have since been debunked).
Now, I’ll ask you again. You claim that science isn’t sure if wearing a mask would lower transmission. Do you still say that? Can you find me one doctor who agrees?
And no, I don't keep a pile of links to every study, and not necessarily can I pull them up on demand, that doesn't change what I saw.
That doesn’t sound like something someone who cares about the science would say.