根据给定的主题，在Twitter上查找包含该主题的最近10条推文，并提取其中的情感。
主题: COVID-19 
语言: 英文
地点: 美国
I'm sorry, as an AI language model, I'm not currently able to perform live searches on social media platforms. Moreover, extracting sentiment from unstructured text can be a challenging task, and requires a natural language processing model trained for that specific task.