Or how many they say it isn't effective at all for? My googling skills aren't the best but I can't find the figures anywhere
I'm not sure there is a figure as such, it's all largely work in progress and also dependent on which vaccine . According to the NHS website ... ''The NHS website advises you should not have the Covid-19 vaccine if you have ever had a ‘serious allergic reaction’ (including anaphylaxis) to ‘a previous dose of the same vaccine’ or ‘any of the ingredients in the vaccine.’ Earlier concerns were about pregnant woment, but recently Pfizer and Moderna have been passed for pregnancy. I haven't seen evidence of any particular group that it doesn't work to some degree for.
I've found one. People like me, with compromised immune systems post chemo. I've had both injections and then had an antibody test after the prescribed wait. It came back negative. I have no antibodies so am still open to the virus. There's some ifs and buts about the result, but the advice from my haematologist is to carry on shielding until science comes up with an answer. The cancer I have is Lymphoma, and the support group estimates that this concerns up to a million people.
That's not the point I was making, I know full well there are cases who for a variety of reasons are not considered suitable at the moment and that is much of the work in progress...but the OP was asking for figures and I don't think there are any official figures ( not that I have seen anyway) . My wife has been in a similar situation to yourself, though with a different form of cancer but was given the go ahead for vaccination by her consultant at Weston Park shortly after starting her second six month round of chemo. Just to add though, my wife has not had a subsequent test to check to see what protection has been afforded.
There's lots of people who can't have it, and up to a million illegal immigrants who won't be having it (unless there's an amnesty). Even if everyone in the country had it it will still come into the country from abroad. There is no way that every single person in the worl is going to get it, Zero Covid is impossible unless it goes away on it's own.
Source? You could get a job in Broadband sales with your ‘up to’ sales pitch, I mean why not ‘up to 2 million’ (according to migration watch) or as few as half a million according to one recent study (using the same type of language)