As the chart below illustrates, we have seen massive changes in the global mortality distribution since the beginning of 2021. On January 8, the share of high-income countries (the non-developing world) reached a maximum of 63%. Between January 8 and July 20, it plunged to 6%!
This was mirrored in a shift of mortality to the developing world. Upper-middle-income countries (UMICs) saw the share rise considerably (from 29% to 56%), but the greatest increase was for the lower-middle-income countries (LMICs): from 7% to 36%. This was driven by India. For low-income countries (LICs), the share in reported mortality went up appreciably from close to 0% to 2% but remained low overall.
Since July 20, however, mortality dynamics started to shift again. The spread of delta and the arrival of colder weather in the Northern Hemisphere winter meant that the high-income share went up again considerably. For the most recent developments, see the chart below.