Am I looking at the wrong parts of those pages? In the first I see "The threshold for establishing herd immunity for COVID-19 is not yet clear." and in the second I see "The proportion of the population that must be vaccinated against COVID-19 to begin inducing herd immunity is not known."
Also, the threshold for herd immunity is based partially on how well the virus spreads, and Delta changed that, which means that the threshold for herd immunity probably changed. When facts change, the messaging needs to change to stay accurate.
It is a moving target because yes - we don't (as a society) have a ton of practice with worldwide pandemics. Information evolves and our expert's interpretation evolves with it. If you reject opinions from everyone who has ever changed their mind after receiving more information you'll be left with one or two ridiculously lucky people and a who bunch of stubborn morons who simply reject the notion that their past selves might have been incorrect.
neither_color|4 years ago
https://web.archive.org/web/20201101161006/https:/www.who.in...
https://www.who.int/news-room/q-a-detail/coronavirus-disease...
jjwiseman|4 years ago
Also, the threshold for herd immunity is based partially on how well the virus spreads, and Delta changed that, which means that the threshold for herd immunity probably changed. When facts change, the messaging needs to change to stay accurate.
munk-a|4 years ago
beervirus|4 years ago
kitkat_new|4 years ago