  The COVID-19 pandemic has created widespread health and economical impacts,
affecting millions around the world. To better understand these impacts, we
present the TweetCOVID system that offers the capability to understand the
public reactions to the COVID-19 pandemic in terms of their sentiments,
emotions, topics of interest and controversial discussions, over a range of
time periods and locations, using public tweets. We also present three example
use cases that illustrates the usefulness of our proposed TweetCOVID system.
