Should my mother inlaw be driving when only 3 weeks ago had been diagnosed with legionaiers disease ,?

Question

we all went on a family holiday to Spain 4 weeks ago, when we returned my mother in law fell ill and was taken into hospital, and diagnosed by a top Doctor as having contracted legionaires disease,her sister is a retired nurse and has signed her out as she is worried about contracting MMR. and is supposed to be looking after her ? but contradictary to this she is back at home on her own and driving about !!!!

Answer 1

its ok ,its a pneuomenia ,if she feels well ,she can take erythromycin even as outpatient

Answer 2

Legionnaire's disease is a form of flu. She should probably stay home though.