Influenza is a viral infection that attacks the respiratory system, including your nose, throat, and lungs. It is a common flu ut different from common stomach flu viruses that trigger diarrhea and vomiting.

In most cases, the flu gets better on its own. But influenza and its complications can be deadly or life-threatening. Some people have a high risk of developing influenza, including:

• Children under age 5, especially infants and adults older than age 65
• Residents of nursing homes and other care facilities
• Pregnant women and women who have given birth recently
• Those with weakened immune systems
• People who have chronic illnesses including diabetes, heart disease, kidney disease, asthma, liver disease, etc.
• People who have more weight than their body mass index