Vital 1st Team Regular
Unless you believe that all black people are evangelical christians, who believe in god rather than medicine, your earlier suggestion wobbles.
I've no idea why you think blacks in their 70's and 80's are less settled and less likely to be registered with GPs than whites? If they are living in more concentrated areas they should be easier to vaccinate, not harder? Surely at that age they would have been in the country for years?
The figures referenced previously refer to "vaccine refusal/acceptance" (i.e. a person has been found and has accepted or refused).