And each of those kids was wearing a mask at all times during the exposure which lead to their infection. Since, as the report notes, infection risk was correlated with proximity, and hence exposure, the masks clearly failed.
You are smart enough to know that right?
The CDC report clearly establishes that the masks being worn by the kids in the classroom failed to prevent their infection.
You should also know that other CDC reports show that vaccinated people can shed the virus at high rates. So an infected, vaccinated teacher in the same situation would, according to the CDC, expel similar amounts of virus particles.
You still haven't succeeded in showing anything that refutes my simple point - the masks being worn by the kids did not protect them from infection. In fact you just presented quotes from the CDC report that show that the CDC themselves found the same thing. Otherwise their would not be infected kids with an infection rate correlating to distance from the teacher.
I don’t know...maybe uou are incapable of discerning what you read...
Straight from the CDC...you can distort your mind, but don’t try to distort, mislead, lie to other people...
What is added by this report?
During May 23–June 12, 2021, 26 laboratory-confirmed COVID-19 cases occurred among Marin County, California, elementary school students and their contacts following exposure to an unvaccinated infected teacher. The attack rate in one affected classroom was 50%; risk correlated with seating proximity to the teacher.
What are the implications for public health practice?
Vaccines are effective against the Delta variant, but transmission risk remains elevated among unvaccinated persons in schools. In addition to vaccination, strict adherence to multiple nonpharmaceutical prevention strategies, including masking, are important to ensure safe school instruction.”