  A search is described for the production of a pair of bottom-type vector-like
quarks (B VLQs) with mass greater than 1000 GeV. Each B VLQ decays into a b
quark and a Higgs boson, a b quark and a Z boson, or a t quark and a W boson.
This analysis considers both fully hadronic final states and those containing a
charged lepton pair from a Z boson decay. The products of the H $to$ bb boson
decay and of the hadronic Z or W boson decays can be resolved as two distinct
jets or merged into a single jet, so the final states are classified by the
number of reconstructed jets. The analysis uses data corresponding to an
integrated luminosity of 138 fb$^{-1}$ collected in proton-proton collisions at
$\sqrt{s}$ = 13 TeV with the CMS detector at the LHC from 2016 to 2018. No
excess over the expected background is observed. Lower limits are set on the B
VLQ mass at 95% confidence level. These depend on the B VLQ branching fractions
and are 1570 and 1540 GeV for 100% B $\to$ bH and 100% B $\to$ bZ,
respectively. In most cases, the mass limits obtained exceed previous limits by
at least 100 GeV.
