Table 5.

Description of the LDA topics on COVID issues.

Topic	Keywords	Representative claim
1. Impact realization	people, coronavirus, new, know, may, never, masks, eyes, Dean, darkness, Jan, Feb, year, first, restrictions, tests, travel	Now they’re doing tests on airlines very strong tests for getting on getting off. They’re doing tests on trains getting on getting off.
2. Public debate	coronavirus, flu, social, pandemic, study, government, distancing, calling, chloroquine, COVID, Trump, said, deaths, cure, rate, patients, CDC, state	During the flu pandemic of 1918 some cities lifted social distancing measures too fast too soon and created a second wave of pandemic.
3. Caution & solution	says, COVID, Bill Gates, health, died, outbreak, world, arrest, mask, think, stimulus, street, check	Aphotograph shows one petri dish that was coughed on by a person not wearing a mask and another petri dish coughed on by the same person wearing a mask.
4. Politicization	would, testing, Texas, virus, Obama, Joe Biden, China, swine, corona,	COVID literally stands for Chinese-originated viral infectious disease.