I'm even more happy to take the AZ after this week's published research from Public Health Scotland,
"By the fourth week after receiving the initial dose, the Pfizer and Oxford/AstraZeneca vaccines had reduced the risk of hospital admissions from Covid-19 by up to 85% and 94% respectively, according to a study by Scottish universities and Public Health Scotland. A
mong people aged 80 and over, vaccination was associated with an 81% reduction in hospital admission risk in the fourth week, when the results for both vaccines were combined.
The scientists, whose work is available online but has not yet been peer-reviewed, said the results from the two vaccines should not be compared. There was more data on people who were given the Pfizer vaccine, while the AstraZeneca vaccine had mostly been administered to older people."
https://www.theguardian.com/world/2021/feb/22/one-vaccine-protection-severe-covid-evidence