Don's Home Health | Pandemics Corona Virus International stats
Mortality - Case Fatality Rate (CFR) - Deaths as a percent of cases.

During an outbreak of a pandemic the CFR is a poor measure of the mortality risk of the disease. Actual infections are greater than confirmed cases and there is a lag between case counts and deaths.
See more at Mortality Risk of COVID-19 - Our World in Data
See also: Mortality Analyses - Case Fatality Rate | Johns Hopkins

Asia:

Deaths per million

Latin America:

In early June when Brazil had the highest number of total new cases in the world, their government removed comprehensive numbers on coronavirus cases and deaths from the Health Ministry's website, claiming without offering evidence that state officials had been reporting inflated figures to secure more federal funding. The numbers were later brought back after a Supreme Court justice ordered the government to stop suppressing the data.

United Kingdom - England - Jan 9
New Variant:
UK and Ireland case rates have shot up since new variants of COVID-19 were discovered.
The U.K. variant was reported on December 14.
Some people are calling it a strain but a strain of a virus has distinct properties and a particular immune response. These are variants.

The South African variant was from three people from Ireland who traveled to South Africa over the Christmas holidays. They think it has been contained as of January 9.
The U.K. variant is more common than the South African variant in Ireland.
Estimates are that the new variant is 50 - 70% more contagious than the previously circulating form of the virus.


Current UK rates
Place Popu-
lation		 Cases Deaths Cases Deaths Posi-
tivity
Rate
Total New * Total New* % of
popu-
lation		 New
/100K		 Total
/1M		 New
/1M
United Kingdom 66,650,000 3,072,349 59,653 81,431 915 4.6% 90 1,222 13.7

10 most populated countries Total and % infected. Dec 21
Pop Million Total Cases M % infected
United States 330 19.13 5.8%
Brazil 212 7.48 3.5%
Russia 143 3.02 2.1%
Mexico 129 1.38 1.1%
India 1,325 10.21 0.8%
Bangladesh 163 0.509 0.3%
Indonesia 273 0.713 0.3%
Pakistan 233 0.473 0.2%
China 1,394 0.96 0.1%
Nigeria 214 0.084 0.04%

Country-Impact:
Why Does the Pandemic Seem to Be Hitting Some Countries Harder Than Others? | The New Yorker Feb. 22, 2021 by writer Siddhartha Mukherjee.

Mukherjee says
"The usual trend of death from infectious diseases—malaria, typhoid, diphtheria, H.I.V.—follows a dismal pattern. Lower-income countries are hardest hit, with high-income countries the least affected. But if you look at the pattern of COVID-19 deaths reported per capita—deaths, not infections—Belgium, Italy, Spain, the United States, and the United Kingdom are among the worst off. The reported death rate in India, which has 1.3 billion people and a rickety, ad-hoc public-health infrastructure, is roughly a tenth of what it is in the United States. In Nigeria, with a population of some two hundred million, the reported death rate is less than a hundredth of the U.S. rate."

There are a variety of theories such as:

researchers at Imperial College London enlisted these variables in building models of COVID-19 mortality. But it didn't work in South Asia and Sub Saharan Africa.
None of which stand out as the primary reason.

Listed to an interview at What Might Explain Why Some Countries Fare So Badly In The Pandemic? | Here & Now | PBS