MLN and infection: rIL-7 treatment led to an increase in cellularity and recovery of T and B the iLN (Fig 6B and 6C, S3A–S3H Fig) while the mLN did not expand further in H. polygyrus-infected mice (Fig 6D), supporting the notion that the size of the lymphocyte pool may be a limiting factor in determining LN size both during steady state and infection.