The flu can make anyone sick, even otherwise healthy people. Roughly 50 percent of people infected with the flu will have the classic symptoms of fever, cough, sore throat, runny or stuffy nose, body aches, headache, chills and fatigue. Some people, especially children, may also have vomiting and diarrhea. These symptoms typically last two to three days, rarely more than five days. Some people are at much higher risk for serious complications or death, including those over 65 years old, children [under 3], pregnant women and [people] with certain chronic medical problems such as asthma, COPD, diabetes, heart disease, obesity or weakened immune systems. It is worth noting that 30 percent of people ages 50 through 64 have at least one medical condition that puts them at higher risk for flu-related complications or death. The risk of hospitalization for influenza-related complications is four times higher for pregnant women than non-pregnant women. Persons 65 years of age and older account for roughly 90 percent of flu-related deaths, so this is a particularly vulnerable group.