Spelling Standardization — Choose the correctly spelled medical noun meaning ‘‘the act of vaccinating’’ (select from Inoculation, Innoculation, Inocculation, Inocullation) with root-based reasoning.

Given data

• Target word: the act of introducing a vaccine or antigen.
• Options: Inoculation, Innoculation, Inocculation, Inocullation

Concept/Approach
The correct spelling is inoculation with single ‘‘n’’ and single ‘‘c’’ after the prefix ‘‘in-’’.

Option analysis
Innoculation — incorrect double ‘‘n’’. ❌Inocculation — incorrect double ‘‘c’’. ❌Inocullation — incorrect double ‘‘l’’ cluster. ❌Inoculation — correct. ✅

Memory tip
Base verb: inoculate → noun: inoculation (keep singles).

Final Answer
Inoculation