These studies permit a fairly precise estimate of the share of those infected who have no symptoms.

这些研究允许对没有症状的感染者的比例进行相当精确的估计。

That would help to provide a check on the accuracy of census and survey data, as well as providing timelier and more precise estimates in between census years.

这将为人口普查和数据调查的准确性把关，同时也可为两次人口普查间的年份提供及时并更精确的估计。