Why do many famine deaths result from disease rather than starvation alone?

Contrary to the common perception that starvation is the primary cause of death during a famine, the majority of fatalities are actually caused by disease.1

This occurs because severe malnutrition significantly impairs the human immune system. Specifically, a lack of essential nutrients—particularly protein—leads to the atrophy of the thymus and a deficiency in helper T cells, which are critical for fighting off infections. As a result, individuals in famine-stricken areas become highly susceptible to infectious diseases such as cholera, malaria, smallpox, measles, and diarrheal diseases.21

These health crises often persist long after the initial food shortages have been addressed, meaning that mortality rates frequently peak well after the period of acute starvation has ended. The synergy between widespread hunger and the rapid spread of illness in vulnerable populations remains a defining, tragic characteristic of famine disasters.13