Yes, though it took forever for both the WHO and CDC to recognize the small aerosol problem We talked and discussed that in depth on that last summer on various covid threads here. . Many experts, according to a NY Times article last week, are now saying both cloth and surgical masks are not very effective against covid delta small aerosols , and that well fitting N95 masks are the only ones that afford much protection. Also, the Israel study is so small that most experts are questioning it. The large national study by the UK actually gives the vaccines very high remarks, especially on stopping hospitalization or severe illness, so on that I'm not sure what study you're referring to. There's lots of very small studies making the rounds, but they're not very inclusive.....Bottom line. Only Vaccines work to keep people that aren't immune challenged, like cancer and transplant patients, from being hospitalized or serious illness/death. I had quoted a UPMC study, from all the way back in early spring, that showed a very high percentage on immune compromised people were incapable of producing covid antibodies after being vaccinated. So the fact that's the vaccinated people (immune compromised due to their illness or drugs they take for it) that usually end up hospitalized should be no surprise. Vaccines just don't work for them at all.