You can produce links to published articles in legitimate peer reviewed journals that confirm that?
As for the 1918 Spanish flu I stand by my statement. The original flu is not with us - but you might want to read this
The true story of how the 1918 pandemic virus was discovered, sequenced and eventually reconstructed in a CDC laboratory to unpack its secrets and protect against future pandemics.
archive.cdc.gov
Everything I read says that H1N1 is the same Spanish flu.
{...
In the years after 1920, the disease came to represent the "seasonal flu". The virus, H1N1, remained endemic, occasionally causing more severe or
otherwise notable outbreaks.
The period since its initial appearance in 1918 has been termed a "pandemic era", in which all flu pandemics have been caused by its own descendants.
Following the
first of these post-1918 pandemics, in 1957, the virus was totally displaced by the novel
H2N2, the
reassortant product of the human H1N1 and an
avian influenza virus, which thereafter became the active influenza A virus in humans.
In 1977, an influenza virus bearing a very close resemblance to the seasonal H1N1, which had not been seen since the 1950s, appeared in Russia and subsequently initiated a "technical"
pandemic that principally affected those 26 and under.
<a href="
https://en.wikipedia.org/wiki/Spanish_flu#cite_note-Taubenberger-2009-191"><span>[</span>188<span>]</span></a><a href="
https://en.wikipedia.org/wiki/Spanish_flu#cite_note-Rozo-2015-192"><span>[</span>189<span>]</span></a>
While some natural explanations, such as the virus remaining in some frozen state for 20 years, have been proposed to explain this unprecedented phenomenon, the nature of influenza itself has been cited in favor of human involvement of some kind, such as an accidental leak from a lab where the old virus had been preserved for research purposes.
Following this miniature pandemic, the reemerged H1N1 became endemic again but did not displace the other active influenza A virus,
H3N2 (which itself had displaced H2N2 through a
pandemic in 1968).
For the first time, two influenza A viruses were observed in cocirculation.
This state has persisted even after 2009, when a
novel H1N1 virus emerged, sparked a
pandemic, and thereafter took the place of the seasonal H1N1 to circulate alongside H3N2.
...}
en.wikipedia.org