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Answers given are for informational purposes only and are not meant to replace an exam by an in-person.
I am Dr. Sohaib, a practicing Internal Medicine Specialist and i will do my best to help you today.
This may return or may not --- depending upon the damage to the olfactory mucosa.
The most important step here is not to repeat the same again.
And the sinus infection should be treated effectively and must be eradicated.
Transient anosmia (transient loss of sensation of smell) can be experienced during and after (up to few weeks) an infection involving sinuses (cold/flu).
Since only 2 weeks have elapsed, she should wait for another 2-4 weeks and ideally any reversible damage to the sensation of smell should recover --- and if this does not, the chances of recovery are not good.
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