The super flu strain is spreading widely around the country.

The nation’s hospitalization rate went up by 14.3 % as of Friday, according to the Centers for Disease Control and Prevention.

Public health officials say the flu is spreading especially quickly in New York, Louisiana and Colorado, The Hill reported Friday. New Jersey and Rhode Island are also seeing high rates of the flu, as of the latest data from Dec. 13. Georgia, New Mexico, Idaho, Michigan, North Carolina, South Carolina, Massachusetts, Connecticut, Maryland and Washington, D.C. have elevated hospital visits for flu symptoms.

Between now and the end of flu season in February, the disease will be spreading in every state to varying degrees, experts say.

The super flu strain is called subclade K. Early sampling of flu cases show that 90% of influenza A viruses were positive for the strain. Experts encourage people to get a flu shot.

Symptoms of the flu include fever, chills, cough, sore throat, runny nose, muscle aches, headaches, fatigue and occasionally vomiting or diarrhea, according to the CDC. While most people get better in a few days or a couple of weeks, some complications, like pneumonia, can be deadly.

Update: This story was updated on Monday, Dec 22 at 2:08 p.m. to reflect that Subclade K is not covered in this year’s flu shot but the A strain is.

Pain ointment pulled from shelves after safety concerns arise

Birmingham tears down another homeless encampment amid questions and outcry

Super-popular Italian restaurant chain making major change

UAB physician and AI innovator may leave US due to parents’ immigration limbo

Read the original article on al.com.