Looks interesting, perhaps because it seems to be a bit more down to earth than some of the other proposals where you have to derive Whitehead&Russell before you're allowed to use the + operator. But it also seems quite dead. The latest link is from 2012.
It is still alive, it has just moved to github! It is a big language and it can prove useful programs. Apparently, part of the Ethereum 2 specification was verified using it. https://github.com/dafny-lang/dafny
I have been learning it and the syntax is close to most C style programming languages. As a software developer this makes it much more approachable than Coq. The proof statements also feel more like the math I learned in college rather than the weird magic keywords of Coq.
They don't release more details officially due to patient confidentiality, but the unofficial word was that a young doctor treating COVID patients died of COVID during the trial, but was in the control group and did not receive the vaccine. It is very sad whenever a doctor dies trying to save others, but especially because they may still be alive if they had been randomized to the vaccination group (of course we don't know that for sure though, since the vaccine may still prove to be effective or ineffective).
What has been reported in the local media, is that the doctor who died did not get the vaccine. He was one of the test subjects, but half of the test subjects receive a placebo instead of the vaccine (the whole point of the experiment is to see how the vaccine compares with a placebo); he was in the group that received the placebo.
How abou: "A revelation is the best way to tell people you are expecting a new family member, getting out of the closet or revealing stuff people don't know about you. It's easy and fun to use. You should give it a try!". Should I add more? Birthday salutations maybe?