I am sure that many illnesses during cold months are related to holiday eating!
Next Christmas, try to have treats that are not related to sweets. Since she is an O, there are so many delicious meat-based meals she can enjoy.
Living in Ireland, it must be awful once you catch any URIs. They are so hard to get rid of!
I find the Midwest of the USA bad enough, but Ireland is so humid (which makes the beautiful greenery!).
Are there any other holidays with lots of sweets coming up? Remind her how sick she is/was. It is so miserable to be ill like that & I feel so bad for her.
Even tho Os thrive on protein, maybe a few days of broths, etc. may help her.
Best wishes for a speedy recovery!