Diseases of Public Health Significance

Diseases of public health significance must be reported to the Medical Officer of Health immediately or by the next working day.

To be reported immediately

The following diseases must be reported immediately to the Medical Officer of Health in accordance with Ontario Regulations 135/18 and amendments under the Health Protection and Promotion Act:

To be reported by next working day

The following diseases must be reported by the next working day to the Medical Officer of Health in accordance with Ontario Regulations 135/18 and amendments under the Health Protection and Promotion Act:

*Although not on the list of reportable diseases, Human Immunodeficiency Virus (HIV) infection is also reportable to the Medical Officer of Health since it is the agent responsible for AIDS.


This item was last modified on April 20, 2022