Skip to main content
. 2022 Mar 9;17(3):e0249723. doi: 10.1371/journal.pone.0249723

Fig 3. The Spike-specific IgA response in milk after SARS-CoV-2 infection is highly durable over time.

Fig 3

(A) IgA endpoint titers determined from Spike ELISA for 28 pairs of milk samples obtained from COVID-19-recovered donors 4–6 weeks and 4–10 months after infection are shown. Mean endpoint values for each group are shown. Blue lines: >10% increase, red lines: >10% decrease, grey lines: <10% change. NS: not significant. A paired t-test (2-tailed) was used to assess significance. (B) IgA endpoint titers for a subset of 14 paired samples obtained 4–6 weeks and 7–10 months after infection. Mean with SEM is shown. Mean endpoint values for the 4–6 week and 7–10 month groups are indicated on the y-axis as green and pink ticks, respectively. Blue bars: >10% increase, red bars: >10% decrease, grey bars: <10% change.