World health research considers global patterns of interaction between people, products, money and information as they affect health trends.
Those with weak support structures are more vulnerable to hunger and starvation than those with strong family networks.
Childhood mortality is high in developing countries where malnutrition, infectious diseases, and unsanitary conditions are widespread.
HIV/AIDS results in high infection and mortality rates amidst inadequate distribution of preventative information and treatment.
The world population has been growing continuously since the 14th century, but the growth rate has been decreasing in the last few decades.
On average, global life expectancies have been increasing and birth rates declining, resulting in global aging.