Dear sir/madam, I am really concerned that your granddaughter has fever for a long duration. Fever usually are due to infections caused by viruses, bacteria etc. If blood tests are negative then she needs evaluation with next level of advanced investigations. Allergies, diabetes don t result in fever. But since fever is for more than two weeks, rare causes of fever like mycobacteria, brucella, infectious mononucleosis, connective tissue disorders etc need to be ruled out. Its good that you are getting evaluated at baystate medical. They might even advice to get admitted for complete evaluation. Don t worry she will be alright. The infection is not probably a common one hence requiring detailed evaluation. Take care. Dr Balaji C