https://thehill.com/policy/healthcare/565814-hundreds-of-staffers-at-two-san-francisco-hospitals-test-positive

At least 233 staffers at a pair of San Francisco hospitals have tested positive for COVID-19, the majority of whom were fully vaccinated but became infected with the delta variant.

https://www.piedmont.org/living-better/will-the-covid-19-vaccine-end-the-pandemic

Will the coronavirus vaccine end the pandemic?

Now that we have COVID-19 vaccines, a big question on many Americans’ minds is, will the vaccine end the pandemic?

“The short answer is yes,” says Saju Mathew, M.D., a Piedmont primary care physician. “The long answer is that unless 85% of Americans get the vaccine, we are not even going to get close to ending the pandemic.”

How many people need to get a COVID-19 vaccine? 

That threshold is critical because that’s how the United States will achieve herd immunity. Note: The herd immunity threshold estimation varies among experts, ranging from 70% to 90%.

“This virus is so contagious and easily transmissible that it’s not going to be enough if only 50% of Americans get vaccinated,” says Dr. Mathew. “Even if I get the vaccine, if I’m around people who didn’t, I can still transmit the virus. The vaccine prevents disease, but it doesn’t necessarily prevent infection.”

https://www.cnn.com/2021/08/02/politics/lindsey-graham-covid-19/index.html

Republican Sen. Lindsey Graham of South Carolina announced Monday that he has tested positive for Covid-19 despite being vaccinated and has experienced "flu-like symptoms," but said that he now has only "mild symptoms" and is very glad he had been vaccinated because "without vaccination I am certain I would not feel as well as I do now."

https://news.joins.com/article/24120638?cloc=joongang-home-newslistleft

미국 애리조나대 연구팀이 지난해 12월부터 올해 4월까지 화이자·코로나 백신을 접종한 3975명의 의료진을 대상으로 진행한 연구에 따르면, 돌파 감염자는 백신 미접종자 대비 몸 안에서 생성되는 바이러스양이 매우 적었고 감염 지속 시간도 짧았다. 

[출처: 중앙일보] 백신 맞아도 걸리는 델타+, 그래도 백신 맞는 한가지 이유