Each winter, millions of people suffer from influenza—the flu. The flu virus infects the nose, throat, and lungs, and spreads from person to person through coughs and sneezes. The video explains why a flu shot is important to help prevent this illness, which can be life-threatening in older adults.
Bird flu is a serious illness that affects the lungs. Currently, it mainly infects birds. This sheet answers some of the questions you may have about bird flu.
