Question

what is the difference between counterstain and vital stain?

Answer 1

Counter Stain:-

A counterstain is a stain with colour contrasting to the principal stain, making the stained structure easily visible using a microscope.

Vital Stain:-

A stain capable of penetrating living cells or tissues and not inducing immediate evident degenerative changes called vital stain.

Hope it helps❤️

Answer 2

In counter staining, living cells have been removed from an organism,

whereas

vital staining is done by injecting or otherwise introducing the stain into the 

body.