FIGURE 2.

Relationships between the anti-Tn and anti-αGal levels, ABO phenotypes and infection status. Antibodies levels are shown as OD450 nm values at 1: 30 and 1: 50 plasma dilutions, respectively. Infected patients are defined as SARS-CoV-2 +, regardless of their clinical status or subdivided as asymptomatic and symptomatic COVID-19 +. Controls presented no sign of disease, were RT-PCR negative and anti-S negative. Violin plots show median values and quartiles (horizontal bars) for each group. P-values from Mann-Whitney between-groups comparisons are indicated: *p < 0.05, **p < 0.01, ****p < 0.0001.