Before revision:  Our data and models are publicly available for research.abstract 
After revision:  Our data and models are publicly available for research.abstract 97\%) and another for detecting misinformation about COVID-19 (best F1=92\%). A human annotation study reveals the utility of our models on a subset of Mega-COV. Our data and models can be useful for studying a wide host of phenomena related to the pandemic. Mega-COV and our models are publicly available.