Factors that may increase your risk of developing influenza or its complications include:

  • Age. Seasonal influenza tends to target young children and older adults.
  • Living conditions. People who live in facilities along with many other residents, such as nursing homes or military barracks, are more likely to develop influenza.
  • Weakened immune system. Cancer treatments, anti-rejection drugs, corticosteroids and HIV/AIDS can weaken your immune system. This can make it easier for you to catch influenza and may also increase your risk of developing complications.
  • Chronic illnesses. Chronic conditions, such as asthma, diabetes or heart problems, may increase your risk of influenza complications.
  • Pregnancy. Pregnant women are more likely to develop influenza complications, particularly in the second and third trimesters.
  • Obesity. People with a BMI of 40 or more have an increased risk of complications from flu.
Aug. 26, 2015