This week is National Influenza Vaccine Week. The Center for Disease Control Chose the week because many people think it's too late to get their flu shot.
Influenza can cause serious illness and secondary infections like Pneumonia.
It can even cause death or hospitalization.
While most people get their vaccine in late Fall, experts say the beginning of Winter isn't too late.
"Influenza can start anywhere from October through May. The peak of the season really starts around January so while it takes two weeks to build immunity, you really have enough time to get hte maximum benefit from the influenza vaccine," said Amy Romandine Kratz, with Primary Care Sports Medicine at Prevea Health.
It's recommended that anyone over the age of 6-months-old get a flu shot unless they've had a severe reaction in the past.
For more information, visit the CDC Website.