A daily pill containing four medicines can cut the number of heart attacks and strokes by a third, a study shows.
The polypill contains blood-thinning aspirin, a cholesterol-lowering statin and two drugs to lower blood pressure.
Researchers - in Birmingham, Iran and the USA - said the pill had a huge impact but cost just pennies a day.
They suggest giving it to everyone over a certain age in poorer countries, where doctors have fewer options and are less able to assess individuals.
We've provided evidence in a developing or middle-income country - and that's a lot of countries - that this is a strategy worth considering."