( 12 ) reported that patients with severe COVID-19 had a highly significant increase in SARS-CoV-2-specific IgA and IgG serum titers depending on the duration of symptom onset, and regardless of patient age and comorbidities.
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( 12 ) reported that patients with severe COVID-19 had a highly significant increase in SARS-CoV-2-specific IgA and IgG serum titers depending on the duration of symptom onset, and regardless of patient age and comorbidities.