Preliminary data from China suggests that a non negligible percentage (maybe 5%) of recovered patients never produce the neutralizing antibody. https://www.med

Preliminary data from China suggests that a non negligible percentage (maybe 5%) of recovered patients never produce the neutralizing antibody. https://www.medrxiv.org/content/10.1101/2020.03.30.20047365v1 https://www.medrxiv.org/content/10.1101/2020.03.30.20047365v... This would mean the antibody test alone cannot tell the full extent of community spread. There's a brief summary of antibody knowledge here. https://www.the-scientist.com/news-opinion/what-do-antibody-tests-for-sars-cov-2-tell-us-about-immunity--67425 https://www.the-scientist.com/news-opinion/what-do-antibody-...