在此之前，他已在本组织工作20余年，最初是在南太平洋岛屿防治麻风病，随后处理疫苗可预防的疾病，包括脊髓灰质炎。

Before that, he had worked for more than 20 years for the Organization, first battling leprosy in the South Pacific islands, then tackling vaccine preventable diseases including polio.

youdao

在此之前，他已在本组织工作20余年，最初是在南太平洋岛屿防治麻风病，随后处理疫苗可预防的疾病，包括脊髓灰质炎。

Before that, he had worked for more than 20 years for the Organization, first battling leprosy in the South Pacific islands, then tackling vaccine preventable diseases including polio.

youdao