A new study from UGA suggests about half of Americans won't get flu shots this year. The CDC recommends just about everyone above the age of six months get an influenza vaccination. But people still seem to have questions about what these shots are and how they work. So, we explain flu shots in our series, Break It Down. Then, we're joined by Professor Robert A. Bednarczyk from the Hubert Department of Global Health and Rollins School of Public Health at Emory University, with more details.