LOUISVILLE, Ky. (WHAS 11)--It's an epidemic that shows no signs of slowing down as tests come back positive by the hundreds in Louisville every week.

Doctors at Norton's Immediate Care Center on Bardstown Rd. in the Highlands are swamped. Tuesday night, they stayed two hours past closing time just to get everyone in.

"This particular center during any time of the year may see 60 patients or so a day. We're seeing close to 100," Dr. Mary Rademaker, the medical director over Norton Immediate Care Centers said.

The majority of people testing positive have the Influenza A strain, but Dr. Rademaker says just recently they've seen an uptick in Flu B, which usually comes with more intestinal issues.

Their weekly patient intake from the first of the year reveals numbers anywhere from four to 10 times higher than what Immediate Care Centers saw this time last year when the flu peaked in March.

Last week, 1,858 people were tested for flu. About 600 came back positive.

The biggest increase happened in the first week of January: More than 600 cases of flu compared to just 64 last year and that's just Immediate Care numbers.

Statistics for Norton Immediate Care for 2017 and 2018

Right now, Dr. Rademaker says about 35 to 40 percent of tests come back positive.

Norton pediatricians are reporting an additional 200 cases a week.

If you're feeling symptomatic, you are urged to go to an immediate care or pediatrician's office first. Avoid the emergency room unless you feel it's an emergency.

The flu test isn't one hundred percent perfect, so the CDC recommends to doctors, if they get a negative test during peak season, to go ahead in many cases and treat those patients for the flu.

It's still not too late to get that vaccine, through doctor's offices may be in short supply at the moment. Dr. Rademaker says to call ahead and check their inventory before you go.