Chūguó qián yào wánchéng suǒ xū de yùfáng jiēzhòng.
You need to complete the required vaccinations before going abroad.
Tips
usage
种 here is pronounced zhòng (to plant / inoculate), not zhǒng (seed / kind). The same character shift happens in 种痘 zhòngdòu 'to vaccinate against smallpox'.
