A 52-amino-acid deletion in the
region of the MHV-A59 spike surrounding S510 relative to the
spike of MHV-JHM (15, 21) eliminates the S510 epitope in the
MHV-A59 spike; thus, infection with MHV-A59 does not elicit
a response to that epitope, but only to S598. While S598-
specific CD8 T cells have been viewed as an unimportant
antiviral effector cells in vivo