https://www.selleckchem.com/pr....oducts/disodium-r-2-
0 μg L-1 with a working range up to 870 μg L-1. The method was validated for real wastewater samples against LC-MS/MS as reference method with good agreement of both methods. Graphical abstract.Evidence suggests that asymptomatic and mild SARS-CoV-2 infections comprise 95% of all cases. Developing a test that indicates past infection and possible immunity against the virus is important. We administered 244 antibody tests to three groups of high-risk population. The test consisted of an IgG component and an IgM
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