Quoted from dinot:In addition, news out of Israel shows a sharp decline in efficacy of the Pfizer vaccine against Delta. My suspicion is that efficacy is the same but that additional exposure is what is causing the rise in infections. So in other words, you have good protection but once many more people get infected you are exposed to more virus. The reassuring note is that protection from hospitalization remains strong (but hospitalizations tend to trail infections by 2-3 weeks)
https://fortune.com/2021/07/05/israel-data-plunge-efficacy-pfizer-biontech-vaccine-delta-variant/
So we really, really need as many people vaccinated as possible.
I'm no math whiz, but I'm having a hard time making sense of the numbers in this article.
"As of July 4, there were 35 serious cases of coronavirus in Israel, compared with 21 on June 19."
Yes, that is a "sharp increase". However, 5,180,000 people have been vaccinated. So out of 5 million, 35 current serious cases.
"Ynet said. Last Friday, 55% of the newly infected had been vaccinated"
So to be generous and say all 35 cases were new, and more than half of them were vaccinated, we are talking less than 20 people out of 5 million.
How does that add up? I understand how serious a single case is (I really do). I just can't figure out how they are calling that a drop in efficacy against Delta because it is so far below the number of actual cases I'd expect at 95% efficacy.