If people are vulnerable or front line they should be eligible no matter their socio-economic status.
The situation in Wales varies considerably from area to area. The case rates in most of North, Mid and West Wales are pretty low, except for the more industrialised areas (i.e. Wrexham and Flintshire).
By far the highest rates are in the former coalfield areas of South Wales: e.g. Merthyr, Torfaen, Blaenau Gwent.
It's to do with poverty, urban density, the types of jobs people do and the underlying health of the population, all of which are more adverse in the Valleys.