jinku gismu

x₁ is a vaccine/immune-system stimulant protecting x₂ against disease x₃ introduced by method x₄.

Also serum; inoculation (= jestu'u veljinku). See also jurme, mikce, jesni, bilma.

jbovlaste

In notes:

jinkytoldu'e: t₁=j₁ is an immune-system deficiency of j₂.
ilmismu: x₁ is an ismu of x₂, having the same meaning, but with all places except the x₃-th (li/set) zi'o-deleted.