Study shows drop in life expectancy in the Gaza Strip
A collaborative team of international researchers estimate that between Oct. 2023 and Sep. 2024 compared to pre-war levels, life expectancy in the Gaza Strip almost halved.
Displaced Palestinians outside their tents near the seaside in Deir al-Balah in the central Gaza Strip in January 2025, following a ceasefire between Israel and Hamas.
(Image: Majdi Fathi/NurPhoto via AP)
Life expectancy in the Gaza Strip has been nearly cut in half (-46.3%) since the current war began in October 2023, according to new estimates published in The Lancet. The study led by Michel Guillot, professor of sociology in the School of Arts & Sciences, and a team of international collaborators found that life expectancy dropped from a pre-war average of 75.5 years to 40.5 years for the period of time between October 2023 and September 2024. The decrease in life expectancy was higher for men (-51.6%; 73.6 years pre-war to 35.6 years) than for women (-38.6%; 77.4 years pre-war to 47.5 years).
The authors calculated three life expectancy scenarios:
The central scenario—based on the official count of fatalities from the Gaza Ministry of Health, excluding the estimated count of individuals reported missing or under the rubble, estimates life expectancy between Oct. 2023 and Sep. 2024 to be 40.5 years
The low scenario—based on deaths for which complete identifying information was available—estimates life expectancy between Oct. 2023 and Sep. 2024 to be 44.4 years
The high scenario—based on the official count of fatalities from the Gaza Ministry of Health, including the lower bound of the estimated count of individuals reported missing or under the rubble—estimates life expectancy between Oct. 2023 and Sep. 2024 to be 36.1 years
The authors caution that the central scenario estimate of 40.5 years life expectancy includes deaths for people whose identification information was not complete and whose existence could not be cross-checked against the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) register. As the estimate doesn’t include individuals reported missing or under the rubble it may still be an underestimation. Additionally, the authors highlight that none of the scenarios include the indirect effects of the war—such as lack of access to health care and malnutrition—on mortality.
Michel Guillot is a professor in the Department of Sociology and a research associate in the Population Study Center in the School of Arts & Sciences at the University of Pennsylvania.
Other authors on the study include Penn Ph.D. candidate José H C Monteiro Da Silva; Mohammed Draidi of the Palestinian Central Bureau of Statistics, Ramallah, Palestine; Valeria Cetorelli of the UN Relief and Works Agency for Palestine Refugees in the Near East, Amman, Jordan; and Ismail Lubbad UN Economic and Social Commission for Western Asia, Beirut, Lebanon.
Griffin Pitt, right, works with two other student researchers to test the conductivity, total dissolved solids, salinity, and temperature of water below a sand dam in Kenya.
Griffin Pitt’s upbringing made her passionate about water access and pollution, and Penn has given her the opportunity to explore these issues back home in North Carolina and abroad.
Helping robots work together to explore the Moon and Mars
Penn Engineers, NASA, and five other universities tested robotic systems designed to help unmanned explorers cooperate in the dunes of White Sands, New Mexico, paving the way for Moon and Mars exploration.
From framework to actions: Provost John L. Jackson Jr. talks Penn Forward
In a Q&A, Provost John L. Jackson Jr. explains the relationship between the strategic framework In Principle and Practice and Penn Forward—a new University-wide process and action plan that will advance Penn forward for the next decade and beyond.
