Some US states tightened their coronavirus restrictions ahead of the Thanksgiving holiday Thursday as many Americans travel to celebrate the national holiday despite the pandemic.

More than 3 million people reportedly passed through airport checkpoints from Friday through Sunday, ignoring the “delay travel plans and stay home” recommendation from the Centers for Disease Control and Prevention (CDC) in fear of a surge in infections.

Restrictions on restaurants and private gatherings in Nevada began Tuesday.

While most counties in California are under a curfew, the state urges those who reside outside its borders who come to celebrate the holiday to self-quarantine for two weeks.

In-person dining will not be available in counties such as Los Angeles and San Diego.

Nebraska also warned tighter social-distancing restrictions would be imposed if hospitalizations keep increasing.

After arriving in Connecticut, Americans have to quarantine for 14 days and fill out a travel health form. A violation of each requirement could result in a $500 penalty.

In Maryland, people are advised to get tested within three days of arriving.

Oregon announced a “two-week” freeze on most activities and nonessential businesses, while neighboring Washington imposed a one-month ban on indoor services at restaurants and gyms.

New York limited private gatherings to 10 people and issued a 10 p.m. curfew on bars, restaurants and gyms.

“Travel may increase your chance of getting and spreading COVID-19. Postponing travel and staying home is the best way to protect yourself and others this year,” the CDC said Thursday.

The health agency said staying at home with family members who live with you is the “safest way” to celebrate the holiday.

For those choosing to travel, the CDC said it is necessary to get a flu shot, wear a mask, maintain social-distancing and wash hands.

The US continues to lead the world with coronavirus cases and deaths. It has more than 12.6 million infections and surpassed 260,000 fatalities, according to Johns Hopkins University.

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