Dear friend, welcome and thanks for entrusting your query here at HCM!
I am Dr. Prasad Akole (Critical Care Expert- http://bit.ly/Dr-Prasad-Akole) and am glad to address to your query here.
The sore throat
indicate an upper respiratory infection
It is common to have low appetite and lethargy
during such episodes.
But we should take chances and miss anything serious like a beginning pneumonia
Is she breathless, expectorating, having fever?
You may go to a hospital to collect her blood samples and get reports earlier and start appropriate treatment.
I hope you are fully satisfied with the guidance I gave.
I would be glad to answer any further queries.
Thank you and Good luck!