In a sobering finding for global health authorities and governments around the world, a group of leading epidemiologists say two in three deaths globally - or 40 million people - go unreported and one in three births - another 40 million people - go unregistered.
University of Melbourne Laureate Professor Alan Lopez, one of The Lancet series lead authors, has been leading a global campaign to improve how countries capture civil registration and vital statistics (CRVS).
"Policy should be informed by accurate and timely data. Poor quality data equals poor decisions, which in turn leads to lost opportunities to improve population health," Lopez said.
In remote areas where there are no doctors, CRVS improvements could include family members of deceased responding to a limited number of questions about symptoms experienced by the deceased which an algorithm using big data samples would then analyse to record a most-likely cause of death, Lopez said.
"In many cases, that algorithm can record cause of death more accurately than a physician," he said.
"We are on the cusp of a quantum leap in using technology to greatly improve the availability and quality of birth and death data even in the poorest countries," Lopez said, adding that "mobile phones are now common virtually everywhere."
"Indeed, accurately recording birth registration and cause of death is vitally important to leaders around the world.
"To put this in perspective, 140 countries, or 80 per cent of the world's population - do not have reliable cause of death statistics," Lopez said.
