Topical Issue - Advances in Metrology and Quality Engineering
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Fig. 5

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The variation of Ψ1(ℜ t) and Ψ2(ℜ t) for ℜt with empirically estimated parameters describing COVID-19 outbreak: γ ={ 1, 1/2, 1/5 } (both models), ν = 1/5, ϱ = 1/10, ζ = 0.116 and μ = 9.4/1000. Coverage: 1–11 September 2020 in the United Kingdom.