InAD321,RomanEmperorConstantine theGreat codified that therewouldbe7days in aweek.Even in themoderneraof evidence-based-medicine, this 1695-year-olddecreeremainsaprimary reference for durationof antibiotic therapy: it leadsphysicians to treat infections in intervals of 7 days. Thus, it is gratifying when clinical trials challenge the standard antibiotic duration of 7 to 14 days. In the past, co...