As public health officials roll out their annual awareness campaign about antibiotic overuse -- including this quiz to test your smarts on when the drugs should be prescribed -- they’re publicizing some scary news along with a little optimism.

First, the bit of good news: The rate of antibiotic prescriptions has dropped by about 17 percent nationwide in recent years. In 2010, doctors wrote antibiotic prescriptions for 80 out of every 100 Americans compared with 96 out of 100 a decade earlier.