Influenza season has not yet officially started, but doctors already see many cases.
CentraCare Health reported 52 cases last week, compared to 26 weeks earlier.
Doctors urge people to get a flu shot.
CentraCare Health is the largest provider of emergency services in Central Florida, and clinics have seen a notable increase in flu cases in recent weeks.
Flu season is officially another month away, but dr. Timothy Hendrix said last week that the number of confirmed influenza cases at CentraCare doubled, jumping from 26 to 52.
"You can not tell if this is a blip in the flu cases coming in, or if this is the start of the season, it's just too early to say," said Hendrix.
The influenza vaccine for the flu season 2018-2019 is now available, and doctors hope that people will heed the warning, despite the fact that last year's flu shot was not as effective as hoped.
"The intake you made last year did not work well and you found that the virus has changed so we probably saw so many sick people," Hendrix said.
Last year's flu season was the worst in years, and some medical experts believe that the coming season could be even worse.
The CDC said it made some changes for the coming year.
The CDC said influenza vaccines have been updated to better match circulating viruses; that the nasal spray vaccine is once again recommended for those who need an alternative to a shot; and experts recommend that people get their shots by the end of October.
In addition to the flu, Hendrix said there is also an increase in upper respiratory tract disorders.
Many people often wonder how to tell the difference between the flu and cold. Hendrix said that if it's the flu, the symptoms will be body aches and no desire to get out of bed.