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Comparison of coronavirus serum antibody titers determined by an indirect immunofluorescence assay for 28 adult hyenas (≥24 months of age) and 7 cubs (≤12 months of age) (Mann–Whitney U-test, U = 139.5, P = 0.08). The central line marks the median titer, each box shows the range of 50% of the values around the median, and the vertical lines indicate the total range of values.
