A common trope among future-based sci-fi is the ability to quickly scan or analyse blood for "known contagions" or stuff like that. It's a capability for which details are often glossed over but in fact, it's rather hard. Today one needs to take a blood sample for each and every test they want to run to check for... anything. There's no one way to scan for "everything."
But that's changing. And in an age where each of the above-mentioned tests is expensive and insurance companies, governments and consumers alike are trying to lower costs and use preventive, rather than reactive measures to keep people healthy, a woman named Elizabeth Holmes just made a breakthrough.
This tech may be worthy of the physiology Nobel Prize.