Explanation:

X goes to a doctor for getting himself treated for a particular disease. The disease is such that it ought not to be disclosed in public. The doctor threatens X, that, the doctor shall make a public disclosure of the disease of X by publishing it. X can obtain perpetual/permanent injunction against the doctor to stop him from making a public disclosure of the disease of X.

Mandatory injunction against the doctor can also be obtained, asking the doctor to perform his duties as a doctor diligently and by asking him, generally, to respect the confidentiality that obtains between a doctor and his patient