Hello dear user! I have gone through your query and understood your concerns! Thank you for sharing them on healthcaremagic. Your granddaughter is at hospital, and I m sure the doctors will do all the best to heal it very soon. Don t be too worried. Fever and sore throat generally happens in strep throat infections. Her pharynx and tonsils may have been infected so a specific cure with antibiotics is needed to cure the infection. Sometimes streptococcus may give its complications to the heart, kidneys and bones, so the doctor might be checking out for all these possibilities to rule out each of them. But I m sure that with the appropriate cure she will be recovered very soon, and everything will go fine. I hope this answer was helpful to you! Please kindly rate it as helpful and write a short review about your experience with me! I would appreciate that a lot. Thank you and best regards! DR ERIOL