"Infectious diseases are the leading causes of death and illnesses worldwide."
http://www.worksafebc.com/publications/health_and_safety/posters/assets/pdf/hand_washing_poster_small.pdf (external - login to view)
Worksafe BC is spreading health misinformation because, in fact, according to this article from the CBC at
CBC News - Canada - Cancer, heart disease lead causes of death
The top ten causes of death in Canada are
2. heart disease
4. chronic lower respiratory diseases
5. accidental causes
8. influenza and pneumonia
9. kidney disease
Infectious diseases do not make the list. What is a danger in the world is not in Canada. Therefore, this poster is misinformation and an explanation is required from worksafebc.com.
The mandate of Worksafe BC is the province of British Columbia, which is within Canada. Worksafe BC has no mandate, they get no taxes from any corporation based in Asia or Africa so they ought not to worry about the big world. Worksafe only gets funding from coporations within British Columbia.
Perhaps worksafebc.com feel they are being "global" here. But they are generating needless fear, or perhaps is reflecting fear of the media. You can be sure, in much of Asia and Africa, they don't wash their hands as often as they should, and people die from many gruesome infectious diseases there.
Even below, from WHO, infectious diseases don't dominate the death list for the world.
WHO | The top 10 causes of death (external - login to view)