School of Mathematics and Statistics Bioinformatics Center Henan University Kaifeng 475001 Henan P.R.China;
School of Mathematics and Statistics Henan University Kaifeng 475001 Henan P.R.China;
Department of Mathematics Wilfrid Laurier University Waterloo Ontario N2L 3C5 Canada;
Virus dynamical model; time delay; density-dependent diffusion; cell-to-cell infection; globally asymptotically stable;