The world is living longer again. Healthy years are still falling behind
WHO estimates show longer lives, with chronic disease increasingly shaping health needs.
The world's lifespan has almost recovered from the shock of Covid-19. Its health has not recovered at the same pace, leaving governments with a challenge that cannot be measured simply by how long people survive.
New World Health Organization estimates released October 2 put global life expectancy at 73.3 years in 2023, compared with 73.4 before the pandemic in 2019. Healthy life expectancy reached 62.8 years, still 0.4 years below its earlier level.
Those are population estimates, not predictions of an individual's lifespan. They also describe 2023, the latest year in the new series, rather than deaths or illnesses recorded this week.
The composition of mortality is changing. Noncommunicable diseases accounted for 74% of deaths in 2023, up from 58% in 2000. Ischaemic heart disease alone caused approximately 9.5 million deaths. Dementia had become the fifth leading cause of death, compared with nineteenth at the start of the period.
That puts sustained treatment, prevention and support alongside emergency response as central demands on health systems.
Chronic disease is not solely an old-age problem. In a separate fact sheet using 2021 data, WHO estimated that 18 million people died from noncommunicable diseases before turning 70. The agency said 82% of those premature deaths occurred in low- and middle-income countries.
The main groups include cardiovascular illness, cancer, chronic respiratory disease and diabetes. Their risks reflect a combination of biology, environment and behavior, including tobacco exposure, unhealthy diets, insufficient physical activity and air pollution. The older figures should not be substituted for the new release's totals: the reporting years and some denominators differ.
WHO identifies primary care as a route to earlier detection and treatment. Screening and management can reduce the need for more expensive intervention later, but countries with inadequate coverage cannot assume everyone will receive those services.
Longer lives also expose a second pressure: care that extends beyond a doctor's appointment. A separate UN review released this week found more countries adopting long-term care policies, while roughly a third reported very little or no dedicated resources to develop them.
The distinction matters for public spending. Adopting a policy does not establish that families can obtain home support, assistive equipment or affordable long-term care. Nor does a global improvement show that every country or income group has gained equally.
The next test is therefore more demanding than restoring the average lifespan. Governments need to show whether people can receive treatment earlier, remain independent longer and obtain support when illness does limit everyday life. The latest numbers describe progress in survival; they do not, by themselves, demonstrate that the services required for those additional years are in place.
