September 20, 2021, marked a grisly milestone for the United States, recording more American deaths from Covid-19 than from the 1918–1919 Spanish flu. 

Another pandemic may be building in China as a new strain of the H1N1 swine flu has already jumped to humans.

With all the similarities, there are several significant differences between the COVID-19 and the Spanish Flu of 1918 pandemics.