Ideas in this flowchart

• Infectious diseases are globally widespread and unequally distributed.
• Infectious diseases are transmitted between individuals.
• Pathogens are infectious agents that produce disease and suffering.
• The term pathogen comes from the Greek words pathos and genès.
• Common examples of pathogens include bacteria and viruses.
• The wider causes of infectious diseases include environmental and institutional conditions.
• Insanitary living conditions affect impoverished communities.
• Inadequate hygiene can occur in modern hospitals.
• Pathogens cause substantial human suffering and disability worldwide.
• The impact also affects relatively wealthy nations such as the United States.
• The impact of infectious diseases is unequally distributed between countries.
• Unequal impacts also occur between individuals and groups within the same population.