Mentioned International Countries

Barbados
Barbados was the only country to see 99.9% of its citizens die as a result of the infection. Only around 200 managed to survive and were able to tell the news to US Military Bases.

Brasíl
Brasíl was one of the most earliest hit countries but it took many months for the country to collapse. Cities like São Paulo were placed under early martial law and rationing was later introduced as a precaution. Before its collapse, most of the city of Rio De Janeiro was engulfed in a "great fire", leaving much of its healthy and infected citizens to be burned alive. Brasíl collapsed before the Great Blizzard.

Canada
Not much is known about Canada. However, The Great Blizzard greatly affected its citizens geographical location and the border was strictly closed until around August-September 2021.

France
Not much is known about France other than its heavy border control was main reason as to why they sustained longer than any other European nation.

India
Much of West India's population fled toward the Arabian Sea trying to reach cruise ships to escape the infected. Those who survived most likely fled toward Tibet and the Himalayas.

Mexico
Not much is known about Mexico other than the zombies supposedly being faster due to the heat. Mexico remained a closed border until their collapse in around August-September 2021.

Russia
Not much is known about Russia other than a border control protest in Moscow was held in May 2021.

South Korea
South Korea was the 2nd hit country after China. It suffered major infections early on and became the first country to collapse due to high infections and deaths. As documented by the Myung family in The First Survivors, only 18 survivors were saved on the first day of the Busan outbreak. Those who survived the major city outbreaks were forced to take a chance of running into the countryside or out at sea. Due to a low survivor count of the Busan outbreak, it is projected that South Korea had one of the highest mortality % of any other country.

United Kingdom
Not much is known about the United Kingdom other than its re-introduction of the death penalty to curfew breakers and survivor smugglers.