Describe the impact of the great influenza pandemic after world war i

The great influenza pandemic of 1918-19, known as Spanish flu, led to 50 million deaths all through the world; even more than the death toll from the aftermath of the World War One (1914-18). Statistically, it led to death of 3% and 6% of the world population.

At that period, pandemic influenza first infection was noted causing a lot of death in the pre-antibiotic period resulting in death from viral pneumonia and more complex bacterial infections.

It began in January 1918, in the period of the war for nine months and even after which led to it's heavy spread across populations.

The epidemic in Western Samoa, led to about 22% of the population death, since there were no protective immunity from likely exposure to previous kinds of (seasonal) flu.

The disease originated from the Alaskan permafrost, where it's whole villages were erased by the Spanish flu. It lead to 20% to 50% of infected people and promoted death in 1% to 5%.

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.