Diseases

Diseases are caused by:

Pathogens can be transmitted by:

Direct contact involves:

Indirect contact involves:

What is the first line of defense of the body against pathogens?

This protects against pathogens in food:

What is hygiene?

A clean water supply, hygienic food preparation, waste disposal, sewage treatment and good personal hygiene can:

Antibodies can:

Active immunity is a defence mechanism led by: