Yeah that's the problem. A couple of ways around this:
First, and my personal favorite, is the rapid fire review of systems. "So any recent rashvisionchangeschestpaindyspneaabdominalpainheadachepeniledischargebleedingbruisingfatiguehomicidalthoughts"? And if you're worried they'll say "yes" to any of the rapid fire questions you start with "so I'm assuming no recent...."
Second is the implied ROS like you alluded to. "Any recent illnesses or injuries?" No = negative for fever, chills, eye discharge, sore throat, cough, vomiting, diarrhea, dysuria, MSK pain, bruising problems, etc etc.
Not that I would ever use either of these methods of course.