Health officials say flu cases are increasing across Kentucky.
At least 75 cases are confirmed statewide, putting Kentucky in the CDC's second-highest category for flu activity.
In Perry County, the increase started just one week ago.
13-year-old Kayla Fore is the latest patient at the Mountain After Hours Clinic getting tested for the flu.
Her mother, Andrea Fore, says, "Last night and this morning both she was running a fever, coughing, having problems in her chest, being cold one minute, hot the next."
Nurse practitioners here saw their first confirmed case last Monday, and five more since then.
Nurse Practitioner Allison Boggs says, "Usually it's a little bit earlier than now, but usually, once you get your first one, you just have a run on them continuously."
Kayla tests negative for the flu, but her symptoms match more and more complaints at the clinic.
Boggs says, "They come in with very high temperatures ranging from 100, 101 all the way up to 104, severe body aches, just lethargic, tired, can't get up."
Health officials say fever and severe body aches are signs you should get tested.
Boggs says, "The thing about the medicine is you have to start it within 48 hours of onset of symptoms, or it's useless to even take."
Nurse practitioners at the Mountain After Hours Clinic are following advice from the CDC, prescribing a different medicine after a new flu strain showed resistance to a traditional treatment called Tamiflu.
Health officials say there are likely more flu cases than they have confirmed, because many of those infected do not get tested.