摘要
Summary What is already known about this topic?The severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)Delta variant has proved to have increased transmissibility,and mutations that can cause partial immune escape,which makes its transmission more insidious.What is added by this report?This study showed that probable cases who had negative results in nucleic acid testing but had positive IgM test result and/or IgG test value of over 20 S/CO in antibodies testing.
基金
The National Key Research and Development Program of China(2020YFC0849200)
National Natural Science Foundation of China(No.91546203,91846302).
