Global life expectancy reached 73.3 years in 2023, almost back to its pre-pandemic level, according to the World Health Organization’s Global Health Estimates covering 2000 to 2023.
The figure compares with 73.4 years in 2019, before COVID-19 drove mortality sharply higher around the world. Healthy life expectancy — the years lived in full health — stood at 62.8 years, a reminder that living longer does not always mean living well.
The clearest long-term shift in the data is the rise of noncommunicable diseases. Conditions such as heart disease, cancer, diabetes and chronic respiratory illness accounted for 74% of deaths, up from 58% in 2000. That change reflects ageing populations, urban lifestyles, tobacco and alcohol use, air pollution and diets high in salt, sugar and processed fat.
Ischaemic heart disease remained the leading killer, responsible for about 9.5 million deaths. Dementia showed one of the steepest rises, moving from the 19th-ranked cause of death to the 5th, with deaths having tripled over the period. As more people survive into their eighties and nineties, diseases of ageing are becoming a central challenge for health systems designed around treating infections and emergencies.
COVID-19, which surged into the top causes during the pandemic years, fell out of the top 10. That decline marks the fading of an acute global shock, even though the virus continues to circulate and its long-term effects are still being studied.
For policymakers, the message is that prevention now carries the largest payoff. Controlling blood pressure, reducing smoking, cleaning the air and making healthy food affordable can prevent or delay many of the conditions at the top of the list. Primary care, not only hospital care, is where those gains are usually made.
The estimates also expose a gap of more than a decade between total life expectancy and healthy life expectancy. Closing that gap — adding life to years, not only years to life — is likely to define health policy for the next generation.
