Abstract
Nowadays, numerical models have great importance in epidemiology. These helps us to
understand the transmission dynamics of infectious diseases in a very comprehensive manner. In disease
epidemiology, vector-host models are important because many diseases are spreading through vectors.
Mosquitoes are vectors of dengue disease as these spread the disease in a population. The infectious vectors
infect the hosts while infectious hosts infect to vectors .Two main groups of dengue patients are septic and
contagious. The susceptible mosquitoes can get dengue infection from infectious humans but not from
infected ones. Humans can be categorized into Susceptible, infected, infectious and recovered ones while
mosquitoes are susceptible, infected and infectious. Susceptible individual can transfer dengue infection
from diseased mosquitoes only. The transmission dynamics of “Fractional order dengue fever” with
incubation period of virus has been analyzed in this paper. Using standard methods for analyzing a system,
the stability of equilibrium points of the model has been determined. Finally, numerical simulation has been
performed for the same problem for different values of discretization parameter ‘h’
