How far do you go young febrile tachy pt?

This is always a preplexing subject and one I've done the whole gamut (h&p then street vs full body imaging and set of labs). Let's say, a 38 yo M comes in with fevers (tmax 102), generalized bodyaches, no respiratory symptoms, no urinary symptoms, no rashes. Denies drugs,alcohol, no daily meds. No exam findings. VS HR 130, BP 120/80, 98% RA. This is a relatively rare ED presentation but I see similar every couple months Options 1. Looks good must be viral, dc home without workup with... How far do you go young febrile tachy pt?
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