Can anyone please explain how to compute basic reproduction number in stochastic disease model?

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I.M. Elbaz

Regarding the stochastic epidemic models, you have to use the Markov Chain approach for calculating the threshold R_0.

Milad Fahimi

I suggest to read this paper:

https://doi.org/10.1016/0025-5564(91)90003-2

Also, for considering stochastic models based on SDEs, our paper can be helpful:

https://www.researchgate.net/publication/338432791_Chaos_in_a_stochastic_cancer_model