@oralloy,
Funny you should ask that - I was just writing this.
From:
https://www.ctvnews.ca/health/coronavirus/pfizer-astrazeneca-preventing-hospitalizations-from-delta-variant-in-britain-1.5470170
"Delta, one of the variants first identified in India, is proving to be the most infectious of the variants known so far, and Monday prompted British Prime Minister Boris Johnson to push back plans to lift all public health restrictions next week.
A surge of cases linked to Delta has tripled the COVID-19 infection rate in the United Kingdom in the last three weeks. The U.K. had seen the number of new cases fall to below 30 for every one million people in mid-May, from more than 1,000 in January. It's now back up to more than 100.
Last month, Public Health England said a single dose of Pfizer or AstraZeneca was only about 33 per cent effective at preventing symptomatic cases of COVID-19 after one dose, but after two doses, that rose to 88 per cent for Pfizer and 60 per cent for AstraZeneca.
On Monday, Public Health England said it had new data that showed the vaccines were doing really well at keeping people from getting extremely sick.
The study, based on 14,000 people with confirmed cases of COVID-19 due to the Delta variant between April 12 and June 4, found two doses of either vaccine were more than 90 per cent effective at keeping people out of the hospital. There were a total of 166 hospitalizations in the group.
After one dose, Pfizer was 94 per cent effective against hospitalization, and AstraZeneca's vaccine was 71 per cent effective."