The article is about the pandemic rather than the disease or virus itself. The most accurate name would probably be "1918-1920 flu pandemic". But in general using the common name is understandable.
The article itself begins:
The 1918–1920 flu pandemic, also known as the Great Influenza epidemic or by the common misnomer Spanish flu
Damn I totally would expect "Spanish flu" to redirect to the scientific name of the disease.
The article is about the pandemic rather than the disease or virus itself. The most accurate name would probably be "1918-1920 flu pandemic". But in general using the common name is understandable.
The article itself begins: