>The survey was online, yes, which is what allowed over 5 million people taking part in it. I didn't get that part. Five million was mentioned, but there were

>The survey was online, yes, which is what allowed over 5 million people taking part in it. I didn't get that part. Five million was mentioned, but there were only five hundred thousand responses. I'd guess five million were offered the survey? >Also 2.1% of the responders had a PhD and 2.0% of the US population has a PhD, that does not seem like "a fair amount higher" The percent with a PhD I could find ranged from 1.2% to 1.6%, and you're ignoring that some amount of the 13% of "no response" would have PhD's as well. >They also mention that "our sample is more educated with higher vaccine uptake than general population, indicating that vaccine hesitancy is underestimated in this sample. Or that indicates people are lying about their education, supporting my previous point. They mention that one of the limitations is that the answers just need to be taken in good faith. So basically I will remain skeptical of Facebook surveys.