Abstract:Longitudinal serum samples, nasopharyngeal/nasal swabs and rectal swab samples were collected from eighty-nine individuals (median age 66 y) with SARS-CoV-2 PCR-positive test results at Linköping University Hospital. Samples were collected from the initial visit and thereafter for up to 2 years of follow-up. The presence of serum IgG and IgA against SARS-CoV-2 antigens (S1-spike, nucleocapsid, and NSP3) was analysed. Nasal and rectal swabs were tested for the presence of mucosal IgA against the outer envelope … Show more
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