claim: detection of antibodies to the sars-cov-2 spike glycoprotein in both serum and saliva coulds detection of infection
evidence_1: conclusions detecting antibody responses in both saliva and serum is optimal for determining virus exposure and understanding immune responses after sars-cov-2 infection.", "anti-spike, but not nucleocapsid, igg, iga and igm antibody responses were readily detectable in saliva from non-hospitalized symptomatic and asymptomatic individuals.", "antibody responses in saliva and serum were largely independent of each other and symptom reporting.")