Table 1.

Percentage of messages that contained pandemic-related seed words/regular expressions before and after the COVID-19 pandemic.

Month and year	% of messages that contained “corona”	% of messages that contained “virus”	% of messages that contained “covid”	% of messages that contained “pandemic”
January 2020	0.0182%	0.0683%	0%	0.0017%
February 2020	0.0785%	0.1604%	0.0045%	0.0074%
March 2020	1.1113%	2.2173%	0.9072%	0.6105%
April 2020	0.4743%	1.0913%	1.2988%	1.0372%
May 2020	0.2848%	0.5751%	1.1225%	0.9988%
June 2020	0.2688%	0.4727%	1.1481%	0.9735%