Probability of testing positive

Suppose that the probability that a random person has a certain disease is $0.005.$ A scientist develops a device which tests a person positive for the disease with $95$% chance when the person really has the disease. However, the same device tests a person positive for the disease with $1$% chance when the person in fact does not have the disease. What is the probability that a person really has the disease when tested positive by the device?