Dr. Anthony Fauci is warning that fully vaccinated people are also susceptible to "long COVID" if they have a breakthrough infection.

"We already know that people who get breakthrough infections and don’t go on to get advanced disease requiring hospitalization, they too are susceptible to long COVID,” Fauci told McClatchy. "You’re not exempt from long COVID if you get a breakthrough infection."

As the delta variant surges, Fauci said, "there could be a variant that’s lingering out there that can push aside delta."

"If another one comes along that has an equally high capability of transmitting but also is much more severe, then we could really be in trouble," he said.

-ABC News’ Cheyenne Haslett

The New York International Automobile Show, set to begin Aug. 20 in New York City, has been canceled due to the spread of the delta variant.

"All signs were positive" when planning began "but today is a different story," show organizers said.

Louisiana now has 2,247 COVID-19 patients in hospitals -- a new all-time high for the state.

This surpasses the previous record set Tuesday of 2,112 patients, the state's Department of Health said.

Louisiana Gov. John Bel Edwards has reinstated a mask mandate for the month of August.

The governor said Wednesday that he won't mandate vaccinations for state employees until the FDA grants full approval.

He said 37.1% of the Louisiana population is fully vaccinated.

Pete Parada, the drummer for pop-punk band The Offspring, says he is not playing with the band at upcoming shows because he is unvaccinated.

Parada wrote on Instagram that he's avoiding the shot on his doctor’s advice, saying he’s had a lifelong battle with the rare neurological disorder Guillain-Barré syndrome and the vaccine's "risks far outweigh the benefits."

Because he's unvaccinated, "it has recently been decided that I am unsafe to be around, in the studio, and on tour," Parada said.

"I have no negative feelings towards my band," he continued. "They're doing what they believe is best for them, while I am doing the same."

-ABC News’ Evan McMurry

A federal judge ruled Sunday in favor of Norwegian Cruise Line and will allow the company to require proof of vaccination on cruises out of Florida despite a state law that bans cruise ships from enacting such an order.

Norwegian sued the state last month contending that the law prevented them "from safely and soundly resuming passenger cruise operations from Miami, Florida."

Florida's law threatens to fine companies $5,000 each time they ask a customer to provide proof that they've been vaccinated.

Florida has seen a surge in COVID-19 cases and hospitalizations in the last couple of weeks, with most cases affecting unvaccinated residents.

Judge Kathleen M. Williams wrote in her decision that Norwegian "has demonstrated that public health will be jeopardized if it is required to suspend its vaccination requirement," and the Florida Department of Health, "identifies no public benefit from the continued enforcement of the Statute Case."

Neither the cruise line nor the Florida Department of Health issued immediate statements about the ruling as of Sunday evening.

-ABC News' Sam Sweeney