[doktorhladnjak]

All pandemics end. That doesn’t mean the disease is eliminated. It means it no longer is spreading uncontrolled around the world.

[lamontcg]

The 1918 pandemic didn't end until 1957. The virus came back as seasonal influenza until it was eventually displaced by H2N2 (as H1N1 displaced whatever influenza was around pre-1918). That H1 envelope protein came back in the 2009 pandemic and has been with us ever since.