Under the Health Protection and Promotion Act, public health works to prevent spread of communicable diseases * some conditions, such as whooping cough, mumps, tuberculosis, rabies, etc should be reported urgently and immediately * other conditions can wait until next business day, such as Lyme, chickenpox, typhoid, etc

Surveillence of West Nile virus, Lyme disease and other diseases transmitted by various means such as ticks and mosquitos, as well as tick identification