There's no need to worry. Since your pet is fully vaccinated and also an adult,  she will be safe.

Since your dog is 2.5 years old and fully vaccinated, there is low to none chance of getting parvo . So , do not worry. Your dog is safe . In hospitals there are nurses and doctors who looks after serious patients suffering from many contagious disease but they do not get the disease .

Ganerally Canine parvovirus is easily spread by direct contact with infected dogs, contact with feces (stool) from infected dogs, or contact with virus-contaminated surfaces. If your dog vaccinated properly there may be chances of getting infection so before going to touch your dog u should clean yourself and proper disinfect the things which comes in contact during handling the dog because its very contagious viral disease.