What to expect with influenza:
- Most people recover completely from influenza within 10 days.
- Some people remain weak and experience fatigue for weeks.
The following people are more likely to have severe symptoms from influenza:
- Alzheimer's disease
- Cystic fibrosis
- Diseases that cause muscle weakness:
- Kidney failure
- Any condition that causes a weakening of the immune system, such as:
- Organ transplant
- Chemotherapy: the administration of medicines that kill cancer cells.
- Daily use of corticosteroid medications, such as prednisone or Medrol
- Severe obesity
- Severe head injury
- Spinal cord injury
Continue to Flu Complications
- Centers for Disease Control and Prevention (CDC)
- Ebell MH, White LL, Casault T. A systematic review of the history and physical examination to diagnose influenza. J Am Board Fam Pract. 2004 Jan-Feb;17(1):1-5. 
- Flu.gov, HHS Interagency Public Affairs Group on Influenza Preparedness and Response
- Jefferson T, Smith S, Demicheli V, Harnden A, Rivetti A, Di Pietrantonj C. Assessment of the efficacy and effectiveness of influenza vaccines in healthy children: systematic review. Lancet. 2005 Feb 26-Mar 4;365(9461):773-80. 
- Montalto NJ. An office-based approach to influenza: clinical diagnosis and laboratory testing. Am Fam Physician. 2003 Jan 1;67(1):111-8. 
- Strategy for Off-Site Rapid Triage(c) (SORT) and Real-time Epidemiological Assessment for Community Health(c) (REACH), Emory University, Principal Investigators: Alexander Isakov, MD, MPH; Arthur Kellermann, MD, MPH, Collaboration with the Emory at Grady Health Literacy Team (Ruth Parker, MD; Kara Jacobson, MPH, CHES; Lorenzo DiFrancesco, MD)
- VHA Office of Public Health Surveillance and Research; Influenza Algorithm Work Group