Extended Data Fig. 9: Germ-free mice have impaired germinal centre formation following vaccination with the PCV13 vaccine.
From: Bifidobacteria support optimal infant vaccine responses

Confocal microscopy of dLNs collected from mock (PBS) and PCV13 vaccinated GF and SPF mice that were vaccinated at day 28 of life with one 3 μg dose of PCV13 vaccine i.p. Data shown are at two weeks post-immunisation. CD3, CD21/35, GL7 and IgD staining are visualised separately and then merged. A white box has been placed around the GL7 staining, which visible only in the vaccinated SPF mice. Data are from a single experiment. The scale bar represents 100 μm.