So if you haven't gotten the flu shot yet, this map should give you a good reason:
The number of jurisdictions experiencing high activity went from 21 states to 26 states and New York City and the number of states reporting widespread activity went from 36 to 46. Influenza-like illness (ILI) went from 4.9% to 5.8%, according to the CDC.
According to the CDC's definition, influenza (also known as the flu) is a contagious respiratory illness caused by flu viruses. It can cause mild to severe illness, and at times can lead to death. The flu is different from a cold. The flu usually comes on suddenly. People who have the flu often feel some or all of these symptoms:
Fever* or feeling feverish/chills
Runny or stuffy nose
Muscle or body aches
Some people may have vomiting and diarrhea, though this is more common in children than adults. * It’s important to note that not everyone with flu will have a fever.
Widespread influenza activity was reported by 23 states:
Regional influenza activity was reported by Puerto Rico and 23 states:
Local influenza activity was reported by the District of Columbia and four states:
District of Columbia
Guam, Puerto Rico and the U.S. Virgin Islands did not report.