I assumed a virus to be something with a very specific geometry,
similar to a crystal, but more complex.
In an answer to What is the size (diameter) of the SARS-CoV-2 virus? some SARS-CoV-2 virus particles are shown.
It looks like they do not have the same geometry.
They may be soft and influenced by external forces, but they could also be of different, but similar shape. Also, they could simply be defective in some way.
I assume a structure of the size of a virus is not rigid. Assuming no external forces, would multiple exemplars of the same kind of virus have the same shape?
Can a virus have a different molecular arrangement, but be equivalent for biological purposes?