@Cherry. Considering the probability that her illness is much more likely to be viral, I would disagree. A sinus or ear infection doesn’t generally cause people to be “stuck in bed”. She clearly hasn’t described her symptoms, but most people are able to say “my ear hurts a lot” or “I have facial pain and thick yellow mucous”.
You may not consider this to be a public health issue, but as an Infectious Diseases doctor, I do. I don’t believe you can assure me her flora will be fine. Azithromycin often causes diarrhea on its own, but could also lead to C. difficile diarrhea. Likewise, it can lead to vaginal yeast infections due to loss of vaginal flora. These are quite common side effects.