(HealthDay News) -- About 10 percent of Americans get the flu each year, mostly as the weather turns colder.
While for most people the flu is a major inconvenience but a minor health threat, for older adults and others with weaker immune systems, the flu can be life-threatening.
The U.S. National Institute on Aging says you should contact a doctor without delay if:
New Flu Variant Could Bring Another Severe U.S. Season
Pentagon Drops Flu Vaccine Requirement For U.S. Military
The Reason Why Many Older Americans Skip Seasonal Vaccines
Heart Patients Urged To Seek Vaccination For Common Infectious Diseases
Flu-Linked Brain Swelling Is Rare in Kids, But It Can Be Fatal
