The city of Philadelphia will begin requiring proof of vaccine to enter a number of businesses. Philadelphia Health Commissioner Cheryl Bettigole said that a Thanksgiving surge and colder weather have prompted the need for stricter measures.

The Hill reports:

Philadelphia will soon require proof of coronavirus vaccination to enter restaurants, bars and a number of other venues, the city announced Monday.

The mandate will go into effect Jan. 3 and require customers and employees to show proof they’ve received two shots of Pfizer of Moderna’s vaccine or one shot of Johnson and Johnson. The city will give people an option to use a negative COVID-19 test from the past 24 hours for the first two weeks of the mandate, but that exemption will end Jan. 17.

Children under the age of 5, who are currently ineligible for vaccines, as well as people with medical and religious exemptions will be permitted to dine indoors if they are carrying a negative test when entering a venue that is hosting over 1,000 people, reports The Philadelphia Inquirer.

City officials also said children ages 5 to 11, who more recently became eligible for vaccines, will only need to show proof of one shot by Jan. 3, but would need to complete the vaccination series by Feb. 3.

The measure applies to other venues where food and drink are being sold but will not apply to to essential places such as schools, daycares, hospitals, or grocery stores.