outbreaks follow predictable seasonal patterns in the United States;
it occurs annually, usually
Healthy adults are usually not at
risk for serious complications. Children, the elderly and those
with certain health problems are at higher risk for serious complications.
Health care providers and hospitals can meet public and patient
Vaccine is developed based on known flu strains and is available
for the annual flu season.
Often effective antivirals are available.
Average U.S. deaths are approximately 36,000/year.
Symptoms: fever, cough, runny nose, muscle ache and fatigue. Deaths
can occur due to complications, such as pneumonia.
Generally causes modest impact on society (those sick should stay
home from work or school).
Manageable impact on domestic and world economy.