Effect of internationally imported cases on internal spread of COVID-19 :   a mathematical modelling study / 
Timothy W Russell [and five others] 
<br/><br/>In: Lancet Public Health 2021 Jan; vol. 6 (1) pages:e12-e20. <br/>doi: 10.1016/S2468-2667(20)30263-2. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COVID-19 --epidemiology<br/>COVID-19 --prevention and control<br/>COVID-19--transmission<br/>Communicable Diseases, Imported --epidemiology<br/>Communicable Diseases, Imported --prevention and control<br/>Models, Theoretical