  The research status of the shear viscosity of nucleonic matter is reviewed.
Some methods to calculate the shear viscosity of nucleonic matter are
introduced, including mean free path, Green-Kubo, shear strain rate,
Chapman-Enskog and relaxation time approximation. Based on these methods,
results for infinite and finite nucleonic matter are discussed, which are
attempts to investigate the universality of the ratio of shear viscosity over
entropy density and transport characteristics like the liquid-gas phase
transition in nucleonic matter. In addition, shear viscosity is also briefly
discussed for the quantum chrodynamical matter produced in relativistic
heavy-ion collisions.
