evidence: The good news is the flu vaccine reduces your risk of getting the flu and of getting seriously ill if you do get sick with the flu. Flu vaccination is especially helpful for people with chronic health conditions. For example, it has been linked to lower rates of heart problems (cardiac events) among people with heart disease and fewer hospitalizations among people who have chronic lung disease or diabetes. Learn more about the benefits of flu vaccination. The flu is contagious, which means it spreads from person to person. It mostly spreads through droplets in the air when people with flu cough, sneeze, or talk. It can spread from up to six feet away. Although it isn't as common, the flu can also spread from surfaces — for example, if you touch something the virus is on and then touch your nose, mouth, or eyes. [...] The flu vaccine is safe and cannot give you the flu. Most people have no problems after getting a flu vaccine.