jes tu'u lujvo

x₁ is a syringe.

In notes:

jinku: x₁ is a vaccine/immune-system stimulant protecting x₂ against disease x₃ introduced by method x₄.
setca: x₁ (agent) inserts/interposes/puts/deposits x₂ into interior x₃/into among/between members of x₃.