Don went on antibiotics on Wednesday. (I don't know why they waited so long to put him on them. Maybe it is a South African thing but as soon as we have a sniff we go on antibiotics!)
Antibiotics are of no use for a viral infection (flu) but in Don's case I would have thought they could have been prescribed as a precaution because of his situation and the possible confusion with similar respiratory problems like pneumonia, a bacterial infection.
Alyn