Table 1.

Tweet counts by data collection method, corresponding time range, and number of keywords used.

Data collection methods	Number of tweets	Time range	Number of keywords
Twitter search API	200,423,651	02/21/20 - 05/01/20	36
Twitter filtered stream API	108,987,452	02/21/20 - 05/01/20	36
Twitter sampled stream API	3,145,428	02/21/20 - 05/01/20	36
Twitter multi-crawler search	253,996,071	05/14/20 - 07/17/20	86
Twitter COVID-19 stream	183,815,527	05/14/20 - 07/17/20	86
Twitter full archive	298,040	02/21/20 - 05/01/20	36
	280,342	05/14/20 - 07/17/20	86