Having accurate and timely data on confirmed active COVID-19 cases is challenging, since it depends on testing capacity and the availability of an appropriate infrastructure to perform tests and aggregate their results. In this paper, we propose methods to estimate the number of active cases of COVID-19 from the official data (of confirmed cases and fatalities) and from survey data. We show that the latter is a viable option in countries with reduced testing capacity or suboptimal infrastructures.

翻译：关于已确认的COVID-19主动病例的准确和及时的数据具有挑战性,因为这取决于测试能力以及是否有适当的基础设施进行测试并汇总其结果,在本文件中,我们提出从官方数据(经证实的病例和死亡)和调查数据中估计COVID-19主动病例数量的方法,我们指出,在测试能力下降或基础设施不足的国家,后者是一个可行的选择。