Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Dec 14;22(12):e21418. doi: 10.2196/21418

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

©Danny Valdez, Marijn ten Thij, Krishna Bathina, Lauren A Rutter, Johan Bollen. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 14.12.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

PMC Copyright notice

Distribution of positive and negative VADER sentiment in COVID-19 corpus. The solid line displays the fraction of tweets that hold positive or negative VADER sentiment in the user timeline data (colored green for positive and red for negative sentiment). The gray and pink annotations denote the day of missing data (February 23, 2020) and the WHO declaration of COVID-19 as a global pandemic (March 11), respectively. VADER: Valence Aware Dictionary for Sentiment Reasoning; WHO: World Health Organization.