Sorry for your diagnosis, but welcome. Where is your primary, TNM grading..Tumor, Nodes, Metasteses. No chemo can be debatable, and many other factors are involved, but there is thought by some doctors of deescalation of HPV positive tumor in Head and Neck cancer treatment, and there are studies being done with that. HPV positive is shown to very responsive to radiation, with chemoradiation even better, and has better prognosis than HPV negative, but there is still no 100 percent cure rate, even with HPV. The majority of results with HPV positive treatments were done with the same treatments given for HPV negative tumors. It's unknown what the long term results are with lesser treatments. Other factors come into play such as Stage, tumor size, grade, local regional metasteses, distant metastases, overall health, underlying medical conditions, and a patients request having chemo or not. Maybe you have all that info, including results from any other scans like CT, MRI and or PET/CT. You basically have one shot at curing this, and should give it your best. Good luck with everything.