The election is approaching against the background of enormous infections in Brazil, a state of emergency in the capital and three other areas, hospitals filling up and widespread opposition to the government.
1. against the background of 等于 on the background of ... ， 在......背景下。
2. of 后面接了 4 个并列的介宾，除了 hospitals filling up 是动名词复合结构作 of 的宾语外，其他3个都是名词词组作宾语。
（1）enormous infections in Brazil,
（2）a state of emergency in the capital and three other areas,
（3）hospitals filling up （动名词复合结构作介词 of 的宾语）
（4）widespread opposition to the government. （用 and 连接起来）
