Shared tasks, also called challenges, are community competitions that help to promote and improve performance on important tasks and have been used with success in biomedical text mining [34]. Several shared tasks were introduced early during the COVID-19 pandemic to facilitate the evaluation of text mining systems. We briefly discuss the Kaggle CORD-19 Research Challenge, the TREC-COVID ad hoc retrieval challenge and the upcoming EPIC-QA challenge, a QA task over both scientific documents and consumer health documents mined from trusted governmental websites.