Part of the bad news in that report:
"...
the influenza virus mutates rapidly, which is why WHO recommends three vaccine formulations that are produced every year, each containing vaccines for 3-4 strains. In comparison, COVID-19 and coronaviruses in general mutate relatively slowly, explains Trevor Bedford, scientist-developer of the platform Nextstrain, which has tracked mutations in the virus since the first genomes were published.
..."
The piece I linked to on the 1918 pandemic was clear that virus mutation helped to eventually blunt the severity of the virus. Looks as though we cannot rely on a similar effect with COVID-19 - that really does mean that an effective and mass available vaccine is the only long term solution.
Originally Posted by: Maunder Minimum