The main idea of the given text is that a huge majority of people believe that the origin of the virus is in the U.S,
This refers to the general thought that is held by a group of people about a particular topic.
Hence, we can see that there is a conducted survey returned the result as 83.1% of people believed that WHO's investigation into the origin of the virus in the U.S was correct.
Read more about public opinion here:
https://brainly.com/question/10404069
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