COVID-19 pandemic data COVID 19 pandemic Medicine https://covid.cd2h.org - national COVID cohort collaborative. Largest COVID cohort dataset? News media Coronavirus News Dataset Twitter TBCOV: Two Billion Multilingual COVID-19 Tweets with Sentiment, Entity, Geo, and Gender Labels (Imran2021TBCOV) Mental health https://twitter.com/tylerblack32/status/1481734046543716356