Furthermore, we explored how the cavity loss or the cavity lifetime, τ c , influences the VSC effects. We find that the VSC modified rate constant in Fig. exhibits a turnover profile from the lossless limit (τ c → ∞) to the lossy limit (τ c → 0), and the rate constant peaks at a particular τ c . To the best of our knowledge, there is no experimental work that reports how VSC-modified rate constant changes as a function of τ c . There is an interesting experiment that measures the exciton-polariton diffusion rate constant with changing τ c , suggesting a decrease in τ c will diminish the diffusion rate constant. Thus, future experiments on checking how VSC-modified rate constant changes with respect to the quality factor of cavities will be needed, even for those reactions that are already reported. Analytic Theory of VSC Rate Constant. Noticing the steady-state behavior of the population dynamics for |ν L and |ν R (red and green curves in Fig. ), we apply the steady-state approximation to the kinetics (Eq. 38) and concluded that the overall forward rate constant is identical to the rate constant of the |ν L → |ν L transition. Using Fermi's Golden Rule (FGR) to evaluate this rate, we arrived at an analytical expression of the VSC-modified rate constant for the system investigated in this work (cf. Eq. 41)