This massive and rapid movement is occurring in the context of global changes that favor the appearance of previously unrecognized microbial threat and a change in the distribution of and burden from well-known infectious diseases.

이 문장인데요,This massive and rapid movement(S) + is occurring (V) // in the context of global changes(ad) /
that favor the appearance of previously unrecognized microbial threat (관계대명사절) /

여기 까지는 알겠는데요 ...

and achange 가 어떤 단어랑 병렬관계인지,
그리고 the distribution of 에서 of는 뭔지.. 뒤가 해석이 안됩니다 ㅠ
고수님들 문장분석 좀 도와주세요 ㅎ