The Lubbock Health Department estimates as many as 7,700 people need to get Hepatitis A vaccine shots.
All diners who ate at Cheddar's from Aug. 31 through Sept. 8 are advised to get the vaccine, but the health department does not have the shots available yet.
Shots will come in 2 doses. The first shot will be free. Anyone who wants the second one will need to get it from their own health provider. The health department will send out a press release as soon as the shots are available.
The health department is recommending shots for everyone who ate at the affected restaurant because infected diners may not show symptoms right away.
The health department has already had 100 calls about the issue as of Wednesday morning.
People with existing liver damage face a higher risk from Hepatitis A.