Out of the four policies that were suggested, I think the most effective one would be the "Improvement of Preventive Care and Health Promotion" policy.
前に三種混合の予防接種を3回やりました。
She had three DPT shots before.
政府は感染が広がることを予防する適切な措置を取らなかった。
The government didn't take appropriate measures to prevent the infection from spreading.
迅速な行動をとれば、将来起こる問題の予防になる。
Prompt action prevents trouble in the future.
治療よりも予防。
Prevention is better than cure.
今週は火災予防週間です。
This is Fire Prevention Week.
もし予防接種証明書があったらお持ちください。
If you have a certificate of immunization, please bring it when you come.