As I've written in another thread.
The government site gives the threshold of
- an absolute risk of 0.5% (or 5 in 1,000)
- a relative risk of 10 (or 10 times the baseline risk)
When I calculated mine as a T1D, aged 44 with a BMI of around 30, it came back at 0.0118% so no shielding for me!
The government stated last summer that it was going to use this to decide who should shield and in what order people would get the vaccine.
In answer to am I worried I would receive a Shielding Letter then NO. I'm more worried about having to work in a large NHS trust. I believe we should have been shielding since day one. Luckily I have now have both my vaccines so starting to feel a little safer.