CDC crisis management communications (not peer-reviewed for clinicaltrials.gov), How to savor "natural" and "experimental" antibody dependent enhancement (ADE), or gain of function, in the lab or in the wild!

'You're vulnerable': Delta variant substantially more contagious than other variants, CDC presentation warns

The agency had been criticized for making the [mask wardrobe] recommendation without adequately supporting its reasons for the policy shift. But the presentation, first made public by The Washington Post, appears to do just that. CDC declined to comment late Thursday on the slideshow or its contents.

The struggle to rationalize "technical" nomenclature and "evidence-base" data continues!

Once infected, though, vaccinated people are just as contagious as those without that protection vaccination -- meaning they need to wear a mask and keep their distance to avoid passing on the virus.
[...]
If more people had been vaccinated earlier this year, cases would not be rising now and a return to masking wouldn't be necessary [?], said Dr. Eric Topol, director and founder of the Scripps Research Translational Institute in La Jolla, California.

"We wouldn't be in this pickle if we'd had 70% of the population vaccinated," he said. "When you have more than half your population not (fully) vaccinated, you're vulnerable."
[...]
In one Israeli study, vaccinated people over 60 were shown to be 97% protected against the alpha variant, but only 85% protected against delta. "Ninety-seven percent is phenomenal, but 81%? [!]" Topol said. "We've got a bigger challenge than ever before."

soooo when everyone is a "silent spreader", no one is contagious?

In a study posted online this week by Pfizer and its collaborator [BWAH!] BioNTech, but not yet peer-reviewed, the companies found their vaccine to be effective for at least six months. Effectiveness topped 90% for that period, according to the study, which was largely conducted before the delta variant became widespread [O RLY?].
[...]
In a Tuesday briefing, CDC Director Dr. Rochelle Walensky downplayed the possibility that a vaccinated person could pass on the virus, without giving the details about the viral load [OG titer] contained in the slideshow.

reference
lab Wan et al., "Molecular Mechanism for Antibody-Dependent Enhancement of Coronavirus Entry"
wild Li et al., "Viral infection and transmission in a large well-traced outbreak caused by the Delta SARS-CoV-2 variant"