> According to a potentially revolutionary theory
  > proposed by Ituro Inoue, a professor at the
  > National Institute of Genetics, the delta
  > variant in Japan accumulated too many
  > mutations to the virus’s error-correcting,
  > non-structural protein called nsp14. As a
  > result, the virus struggled to repair the errors
  > in time, ultimately leading to “self-destruction.”

I know it's been 50 years since its publication, but please don't spoil the plot of The Andromeda Strain likes that, Japan Times.