Humoral response and PCR positivity in patients with COVID-19 in the New York City region, USA: an observational study oleh Ania Wajnberg, MD, Mayce Mansour, MD, Emily Leven, MD, Nicole M Bouvier, MD, Gopi Patel, MD, Adolfo Firpo-Betancourt, ProfMD, Rao Mendu, PhD, Jeffrey Jhang, ProfMD, Suzanne Arinsburg, DO, Melissa Gitman, MD, Jane Houldsworth, PhD, Emilia Sordillo, MD, Alberto Paniz-Mondolfi, MD, Ian Baine, MD, Viviana Simon, ProfMD, Judith Aberg, ProfMD, Florian Krammer, ProfPhD, David Reich, ProfMD, Carlos Cordon-Cardo, ProfMD