Martin Fenstersheib, the chief medical officer for Santa Clara County, was cited as saying on Thursday that about 4,000 customers could be at risk after a worker at a Jamba Juice store in San Jose, California, developed hepatitis A, adding,

"During the time she was infectious, she was also working at Jamba Juice, so we were concerned that even though there is a corporate policy of good hand washing, you can’t be 100 percent sure."

Paul Clayton, Jamba Juice’s chief executive, was quoted as saying in a statement,

"Jamba Juice will pay eligible individuals, who satisfy the reimbursement requirements, their reasonable, out-of-pocket medical expenses related to the diagnosis and treatment of hepatitis A."

Wash your hands. And don’t serve poop.