Life Expectancy

Life expectancy is a measure of the average number of years a person is expected to live based on current health conditions and trends. It’s influenced by various factors including access to healthcare, nutrition, education, environmental quality, socioeconomic status, and public health initiatives.

Key Points:

• Between 1900 and 1999, life expectancy in the United States increased by over 30 years.
• Approximately 25 of those additional years are attributed to advancements in public health efforts (public-health]).
• Public health interventions such as sanitation improvements, vaccination programs, and clean water initiatives have significantly contributed to this increase.

Related Concepts

• Social Determinants of Health
• Healthcare Access
• Epidemiology

Resources:

• Video: What is Public Health? by Let’s Learn Public Health (https://www.youtube.com/watch?v=t_eWESXTnic)

2026 04 11 Introduction to Public Health Definition Role and Social Determinants

Source Notes

• 2026-04-11: What is Public Health??