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Table 1 All variables in system (6) and their definitions

From: Fractional optimal control in transmission dynamics of West Nile virus model with state and control time delay: a numerical approach

Variable Definition
\(M_{s}(t)\) The population of susceptible mosquitoes
\(M_{i}(t)\) The population of infected mosquitoes
\(N_{M}(t)\) The total population of mosquitoes \(N_{M}(t)=M_{s}(t)+M_{i}(t)\)
\(B_{s}(t)\) The population of susceptible birds
\(B_{i}(t)\) The population of infected birds
\(N_{B}(t)\) The total population of birds \(N_{B}(t)=B_{s}(t)+B_{i}(t)\)
S(t) The population of susceptible humans
E(t) The population of exposed humans
I(t) The population of infected humans
H(t) The population of hospitalized humans
R(t) The population of recovered humans
\(N_{H}(t)\) The total population of humans \(N_{H}(t)=S(t)+E(t)+I(t)+H(t)+R(t)\)