Abstract: The present disclosure relates to methods and kits for detecting SARS-CoV-2 virus in a patient. For example, a method is disclosed that includes contacting at least a portion of a diluted saliva sample, the diluted saliva sample including a saliva sample from a patient and a saline solution, with a radiolabeled SARS-CoV-2-targeted antibody to form a first solution that includes target bound antibody and unbound antibody; separating at least a portion of the target bound antibody from the unbound antibody in the first solution to form a separated target bound antibody solution; and detecting a radiation level in the separated target bound antibody sample indicating the presence of the target bound antibody in the separated target bound antibody sample.