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Article	R. Schlickeiser, M. Kröger First consistent determination of the basic reproduction number for the first Covid-19 wave in 71 countries from the SIR-epidemics model with a constant ratio of recovery to infection rate Global J. Front. Res. F 20 (2020) 37-43
The box-shaped serial interval distribution and the analytical solution of the Susceptible Infectious-Recovered (SIR)-epidemics model with a constant time-independent ratio k of the recovery (μ0) to infection rate (a0) are used to calculate the effective reproduction factor and the basic reproduction number R0. The latter depends on the positively valued net infection number x = 13.5(a0-μ0) as R0(x) = x(1 - e-x)-1 which for all values of x is greater unity. This dependence differs from the simple relation R0 = a0/μ0. With the earlier determination of the values of k and a0 of the Covid-19 pandemic waves in 71 countries the net infection rates and the basic reproduction numbers for these countries are calculated. for LaTeX users @article{RSchlickeiser2020-20,  author = {R. Schlickeiser and M. Kr\"oger},  title = {First consistent determination of the basic reproduction number for the first Covid-19 wave in 71 countries from the SIR-epidemics model with a constant ratio of recovery to infection rate},  journal = {Global J. Front. Res. F},  volume = {20},  pages = {37-43},  year = {2020} } \bibitem{RSchlickeiser2020-20} R. Schlickeiser, M. Kr\"oger, First consistent determination of the basic reproduction number for the first Covid-19 wave in 71 countries from the SIR-epidemics model with a constant ratio of recovery to infection rate, Global J. Front. Res. F {\bf 20} (2020) 37-43. RSchlickeiser2020-20 R. Schlickeiser, M. Kr\"oger First consistent determination of the basic reproduction number for the first Covid-19 wave in 71 countries from the SIR-epidemics model with a constant ratio of recovery to infection rate Global J. Front. Res. F,20,2020,37-43