Testing is our window onto the Coronavirus happening (COVID-19). Our central metric for understanding how the virus is spreading – the variety of confirmed instances – consists of all these individuals United Nations agency have examined positively.Crucially, then, that is conditional how numerous individuals a rustic really assessments. A rustic that has examined only a few individuals can solely have only a few confirmed instances.Only as a result of widespread testing is as well one of many key measures for tackling the pandemic, the connection between testing cases as well goes the opposite manner. International locations United Nations agency have managed to comprise their happening, were in a position to K.E. the variety of infections low, have to carry out assessments to inadequately monitor the happening than these international locations the place the virus has unfold extra .For a similar causes, the timing of testing is as well essential. A excessive charge of testing will do extra to gradual the happening if carried out earlier on, when there fewer infections.As associate degree indicator of how proactive a rustic’s testing response has been, the variety of assessments carried out up to now then solely tells a small a part of the story. Technology does number take into account two essential, intently associated questions:When did these assessments occur?How intensive is testing relative to the scale of the happening nation?Right here we reply these two questions for 4 key international locations: South Korean Peninsula, Italian Republic, the UK, the United States.