Though flu has been widespread in Louisiana this season, it's been mild compared to last year.
But emerging data, just revealed by health officials, suggest the second half of this season may be more aggressive, and it's only just beginning.
The CDC says a deadly, secondary strain of the bug has begun to reappear.
Until now, the dominant flu strain in Louisiana has been H1N1, which is much milder than last year's virus.
The H3N2 strain killed 80,000 Americans last year. And, the CDC says that strain is accounting for almost half of all new diagnoses this year.
"We've seen this in Louisiana for the last several weeks, that the H3N2 strain was more predominant," says Dr. Lopez. "And, now the whole country is seeing that."
Flu rates are already high in 33 states, with around 19,000 confirmed deaths, including 158 children, according to the CDC.
And, Dr. Lopez warns that last week's Mardi Gras crowds could add to local flu numbers.
"We've been seeing quite a bit of it, even in the absence of the visitors. Now, if a lot of visitors came in who were sick, clearly they can transmit their viral strains to other people, as well."
If you've been vaccinated this season, you're protected against both flu strains. If not, it's not too late to get the shot...and it's highly recommended.