Testing is our window onto the Coronavirus occurrent (COVID-19). Our central metric for understanding how the virus is spreading – the variety of confirmed circumstances – consists of all these individuals United Nations agency have examined positively.Crucially, then, that is depending on how individuals a rustic truly checks. A rustic that has examined only a few individuals can solely have only a few confirmed circumstances.Only as a result of widespread testing is besides one of many key measures for tackling the pandemic, the connection between testing anno Dominicases besides goes the opposite means. Nations United Nations agency have managed to comprise their occurrent, anno Dominiwere in a position to mechanical energy the variety of infections low, must carry out more checks to inadequately monitor the occurrent than these international locations the place the virus has unfold extra .For a similar causes, the timing of testing is besides essential. A excessive price of testing will do extra to sluggish the occurrent if performed earlier on, when there George William Russellfewer infections.As associate degree indicator of how proactive a rustic’s testing response has been, the variety of checks performed then solely tells a small a part of the story. does take into account two essential, intently associated questions:When did these checks occur?How intensive is testing relative to the scale of the occurrent nation?Right here we reply these two questions for 4 key international locations: South Korean Peninsula, , the UK, anno Dominithe United States.