<s>[INST] hello, my two grandsons (cousins, ages 9 and 6) have the same symptoms. Core throat, fever, bloodshot eyes, pain in legs. They live in different states, were last together the week between Christmas and New Years. Have tested negative to flu, mono, strep. What in the world could this be? [/INST] Hi.... by what you say, I feel that both your grandchildren are going through a viral illness. All these non specific symptoms like cough, coryza, congested eyes and sore throat, along with myalgia are suggestive of the same.Moreover you say they had been together last week. So it all adds up. Nothing to worry...they will come out of it well.Regards - Dr. Sumanth </s>