The Health Protection and Promotion Act (HPPA) outlines the communicable diseases that are designated reportable in the province of Ontario.

Under the authority of the HPPA, Ontario Regulations 559/91, these diseases or suspected occurrences of these diseases, must be reported to the local Health Unit by physicians, laboratories, administrators of hospitals, schools and institutions.

The public health system depends upon these reports of communicable diseases to monitor the health of the community and to provide the basis for preventive action.

List of Reportable Diseases in Ontario

Note: Diseases marked * should be reported immediately to the Medical Officer of Health by telephone.

Other diseases can be reported by the next working day by fax, phone or mail.