The European Union is set to potentially impose travel restrictions on the United States once again, a precautionary move that is likely to come next week as the Delta variant continues to spread across the U.S.

After originally lifting a travel ban in June, the EU is now once again toying with the idea of limiting American access to member nations. The U.S. has breached the threshold of 75 new cases per 100,000 residents in a 14-day period, Bloomberg reports.

Imposing the ban on the U.S. would require a majority agreement from the members of the EU and the restrictions would apply to non-essential travel. However, fully vaccinated people may fly to Europe if they choose to.

As cases continue to rise in the U.S., Dr. Anthony Fauci says the U.S. “could be in trouble” if a new strain were to overtake the Delta variant, which has a viral load 1,000 times higher than the original variant.

“If we do the immediate, intermediate, and long-term and do the mitigation right now, we will turn the Delta surge around,” Fauci added.

The U.S. is reporting a seven-day average of 94,000 cases, according to Johns Hopkins University. The U.S. topped 100,000 cases on Monday and Tuesday.

The Delta variant has already been proven to infect vaccinated people and is expected to lead to an increase in breakthrough infections as people move indoors for the fall, CNBC reports.

Moderna says its two-dose vaccine is “durable” but did say that a third dose “will likely be necessary prior to winter.”