\providecommand{\newblock}{}
\begin{thebibliography}{10}
\expandafter\ifx\csname url\endcsname\relax
  \def\url#1{{\tt #1}}\fi
\expandafter\ifx\csname urlprefix\endcsname\relax\def\urlprefix{URL }\fi
\providecommand{\eprint}[2][]{\url{#2}}
% Bibliography created with iopart-num v2.1
% /biblio/bibtex/contrib/iopart-num

\bibitem{Backer+20}
Backer J~A, Klinkenberg D and Wallinga J 2020 {\em Eurosurveillance\/} {\bf 25}
  10--15 ISSN 1025-496X

\bibitem{Zhou+20}
Zhou T, Liu Q, Yang Z, Liao J, Yang K, Bai W, Lu X and Zhang W 2020 {\em J.
  Evidence Based Medicine\/} {\bf 13} 3--7 ISSN 1756-5383

\bibitem{Singer+20}
Singer H~M 2020 {\em Phys. Biol.\/} {\bf 17} ISSN 1478-3967

\bibitem{Wu+20b}
Wu K, Darcet D, Wang Q and Sornette D 2020 {\em Nonlin. Dynam.\/} {\bf 101}
  1561--1581 ISSN 0924-090X

\bibitem{Britton+20}
Britton T, Ball F and Trapman P 2020 {\em Science\/} {\bf 369} 846+ ISSN
  0036-8075

\bibitem{Prasse+20}
Prasse B, Achterberg M~A, Ma L and Van~Mieghem P 2020 {\em Appl. Network
  Sci.\/} {\bf 5}

\bibitem{Chen+20}
Chen Y, Cheng J, Jiang Y and Liu K 2020 {\em J. Inverse and Ill-posed
  Problems\/} {\bf 28} 243--250 ISSN 0928-0219

\bibitem{Wu+20}
Wu J~T, Leung K and Leung G~M 2020 {\em Lancet\/} {\bf 395} 689--697 ISSN
  0140-6736

\bibitem{Britton20}
Britton T 2020 {\em Statistica Neerlandica\/} {\bf 74} 222--241 ISSN 0039-0402

\bibitem{Wang+20}
Wang F~S and Zhang C 2020 {\em Lancet\/} {\bf 395} 391--393 ISSN 0140-6736

\bibitem{Tang+20}
Tang B, Bragazzi N~L, Li Q, Tang S, Xiao Y and Wu J 2020 {\em Infectious
  Disease Modelling\/} {\bf 5} 248--255

\bibitem{Roosa+20}
Roosa K, Lee Y, Luo R, Kirpich A, Rothenberg R, Hyman J~M, Yan P and Chowell G
  2020 {\em Infectious Disease Modelling\/} {\bf 5} 256--263

\bibitem{Bra20}
Brandenburg A 2020 {\em Infectious Disease Modelling\/} {\bf 5} 681--690

\bibitem{Ziff+Ziff20}
Ziff A~L and Ziff R~M 2020 {\em Int. J. Educational Excellence\/} {\bf 6}
  43--69 ISSN 2373-5929

\bibitem{Maier+Brockmann20}
Maier B~F and Brockmann D 2020 {\em Science\/} {\bf 368} 742+ ISSN 0036-8075

\bibitem{Bodova+Kollar20}
Bod'ova K and Kollar R 2020 {\em Phys. Biol.\/} {\bf 17} ISSN 1478-3967

\bibitem{Radicchi+Bianconi20}
Radicchi F and Bianconi G 2020 {\em Phys. Rev. E\/} {\bf 102} ISSN 2470-0045

\bibitem{Blanco+21}
Blanco N, Stafford K~A, Lavoie M~C, Brandenburg A, Gorna M~W and Merski M 2021
  {\em Epidemiology and Infection\/} {\bf 149} ISSN 0950-2688

\bibitem{Triambak+21}
Triambak S, Mahapatra D~P, Mallick N and Sahoo R 2021 {\em Epidemics\/} {\bf
  37} ISSN 1755-4365

\bibitem{Rast22}
Rast M~P 2022 {\em Phys. Rev. E\/} {\bf 105} ISSN 2470-0045

\bibitem{DATA}
{Brandenburg} A 2020 {\em {Datasets for Piecewise quadratic growth during the
  2019 novel coronavirus epidemic, doi:10.5281/zenodo.4016941 (v2020.09.07)}\/}

\bibitem{KMK27}
{Kermack} W~O and {McKendrick} A~G 1927 {\em Proc. Roy. Soc. Lond. Ser. A\/}
  {\bf 115} 700--721

\bibitem{JOSS}
{Pencil Code Collaboration}, {Brandenburg} A, {Johansen} A, {Bourdin} P,
  {Dobler} W, {Lyra} W, {Rheinhardt} M, {Bingert} S, {Haugen} N, {Mee} A,
  {Gent} F, {Babkovskaia} N, {Yang} C~C, {Heinemann} T, {Dintrans} B, {Mitra}
  D, {Candelaresi} S, {Warnecke} J, {K{\"a}pyl{\"a}} P, {Schreiber} A,
  {Chatterjee} P, {K{\"a}pyl{\"a}} M, {Li} X~Y, {Kr{\"u}ger} J, {Aarnes} J,
  {Sarson} G, {Oishi} J, {Schober} J, {Plasson} R, {Sandin} C, {Karchniwy} E,
  {Rodrigues} L, {Hubbard} A, {Guerrero} G, {Snodin} A, {Losada} I,
  {Pekkil{\"a}} J and {Qian} C 2021 {\em J. Open Source Softw.\/} {\bf 6} 2807

\bibitem{BM04}
{Brandenburg} A and {Multam{\"a}ki} T 2004 {\em Int. J. Astrobiol.\/} {\bf 3}
  209--219 (\textit{Preprint} \eprint{q-bio/0407008})

\bibitem{Noble74}
{Noble} J~V 1974 {\em Nature\/} {\bf 250} 726--729

\bibitem{Murray+86}
{Murray} J~D, {Stanley} E~A and {Brown} D~L 1986 {\em Proc. Roy. Soc. Lond.
  Ser. B\/} {\bf 229} 111--150

\bibitem{Barzon+21}
{Barzon} G, {Kabbur Hanumanthappa Manjunatha} K, {Rugel} W, {Orlandini} E and
  {Baiesi} M 2021 {\em J. Phys. A Math. General\/} {\bf 54} 044002
  (\textit{Preprint} \eprint{2010.03416})

\end{thebibliography}
