What is the ruling on the salary received from a job obtained through cheating in the medical examination, and what is its expiation?

It is prohibited to defraud the systems of a country that prevent a patient with an infectious disease from residing there, in order to prevent harm to others. Paying money to falsify a medical report is considered bribery and cooperation in violating a state order. However, the salary earned from work that was completed as required is permissible.