Health policy advocates are quick to note that viruses exploit the unvaccinated to breed and create dangerous new variants.

卫生政策倡导者很快注意到，病毒利用未接种疫苗的人繁殖和创造危险的新变种。

Due to the ethnic discrimination and differential treatment policy advocated by the rulers of the Yuan dynasty, the officialdom of Han nationality were strictly controlled and suppressed.

由于元朝统治者推行的民族歧视和差别待遇政策，汉族官场受到严格控制和打压。