Spanish Flu 1918:

Number of deaths: 50,000,000 
Virus strain: H1N1
Confirmed cases: 500 million (estimate)
Disease: Influenza
Period: January 1918 – December 1920

Estimates suggest that the world population in 1918 was 1.8 billion.

% of deaths worldwide from spanish flu 2.7777777777777777 %

% of people worldwide contracting spanish flu 27.77777777777778 %

1957-1958 Pandemic (H2N2 virus):

World population 2,873,306,090
deaths worlwide 1.1 million

% of deaths worlwide from H2N2 virus 0.03828342562695783 %

 

Covid-19 Coronavirus 2019-2020

Earth population today 7,794,798,739

As of 04/20/2020

Worldwide Confirmed     2,499,723 
Recovered 659,589
Deaths 171,718

Deaths worlwide from covid19 0.0022029818312156936 % of world population

Confirmed cases worldwide covid19 0.032069115363980404 % of world population