  It is experimentally known that virus exhibits stochastic motion in cytoplasm
of a living cell in the free form as well as the form being contained in the
endosome and the exponent of anomalous diffusion of the virus fluctuates
depending on localized areas of the cytoplasm. Here, a theory is developed for
establishing a generalized fractional kinetics for the infection pathway of the
virus in the cytoplasm in view of superstatistics, which offers a general
framework for describing nonequilibrium complex systems with two largely
separated time scales. In the present theory, the existence of a large
time-scale separation in the infection pathway is explicitly taken into
account. A comment is also made on scaling nature of the motion of the virus
that is suggested by the theory.
