Before revision: Several high-profile sources have focused worldwide attention on the dangers of misinformation about COVID, with the World Health Organization declaring a COVID-19 social media ``infodemic''. Prior work has associated such misinformation with low-credibility sources that are known to spread conspiracy theories and malicious content.5, 6 Here, we report the results of an analysis of over 500 million social media posts from Twitter and Facebook  between March 8 and May 1, 2020.
After revision: Several high-profile sources have focused worldwide attention on the dangers of misinformation about COVID, with the World Health Organization declaring a COVID-19 social media "infodemic", with special attention to misinformation -- frequently understood as false claims. To understand the infodemic's scope and scale, we analyzed over 500 million social media posts from Twitter and Facebook between March 8 and May 1, 2020.