When a country crosses the World Bank’s threshold from low- to middle-income status, it is deemed too rich to qualify for aid, even though it is not yet rich enough to cover its health costs.

Tom Achoki & Walter O. Ochieng warn that too many countries are graduating from low-income status before they can cover their health costs.

When a country crosses the World Bank’s threshold from low- to middle-income status, it is deemed too rich to qualify for aid, even though it is not yet rich enough to cover its…