preventive measure; precautionary measure; precaution
A formal term for steps taken in advance to prevent something undesirable, often used in medical, safety, or policy contexts.
Mask-wearing was mandated as a preventive measure against the spread of infection.
We should take the necessary precautionary measures to prevent accidents.
対策 is a broader term for countermeasures or measures to deal with a problem, while 予防措置 specifically emphasizes advance prevention.
防止策 is a plan or policy for prevention, often used in similar contexts, but 予防措置 can sound more formal or institutional.
Compound of 予防 (prevention) and 措置 (measures, steps). Both components are Sino-Japanese words.