这些可能是父源性的、描述性的或职业性的。

These might be patronymic, descriptive or occupational.

youdao

步行穿越有自由活动的H5N1感染或疑似感染鸟类的农场，或进入有H5N1感染或疑似感染鸟类的禽舍时，就可能出现职业性接触。

Occupational exposure can occur when walking through farms with free-roaming H5N1 infected or suspected birds or entering poultry houses with H5N1 infected or suspected birds.

youdao

可通过抗病毒预防药物(奥斯他韦)或接触后预防措施，保护在受感染或有危险农场面临职业性接触风险者3。

Those at risk of occupational exposure on affected or at-risk farms can be protected via antiviral prophylaxis (oseltamivir) or post-exposure prophylaxis.3.

youdao

可通过抗病毒预防药物(奥斯他韦)或接触后预防措施，保护在受感染或有危险农场面临职业性接触风险者3。

Those at risk of occupational exposure on affected or at-risk farms can be protected via antiviral prophylaxis (oseltamivir) or post-exposure prophylaxis.3.

youdao