Table 1.

Classification criteria for tweets and definitions.

Type of tweet		Definition	Translated examples (French to English)
Classification problem 1
	Unclassifiable	Unclassifiable or irrelevant to the topics of vaccination or health measures	The Emmanuel Macron effect
	Noncommittal	Neutral or without explicit opinion on vaccination and/or the health pass	I have to ask my doctor for the vaccine
	Pros	Arguments in favor of the health pass Arguments in favor of the COVID-19 vaccine and/or the health pass (efficiency, safety, relevance)	Personally, I am vaccinated so nothing to fear, on the other hand, good luck to all the anti-vaccine, you will not have the choice now??
	Cons	Arguments against vaccination or doubts about the effectiveness of COVID-19 vaccines, fear of side effects, and refusal to obtain the health pass	I am against the vaccine I am not afraid of the virus but I am afraid of the vaccine
Classification problem 2
	Unclassifiable	Irrelevant to the topic or unclassifiable	A vaccine
	Scientific	Scientific or pseudoscientific content that uses true beliefs or false information	The vaccine is 95% efficient, a little less in fragile people. The risk is not zero, but a vaccinated person has much less chance of transmitting the virus.
	Political	Comments on legal or political decisions about vaccination or health measures	Basically the vaccine is mandatory, shameful LMAO
	Social	Comments, debates, or opinions on the report to other members of society	“Pro vaccine” you have to also understand that there are people who do not want to be vaccinated.
	Vaccination status	Explicit tweet about the vaccination status of the tweet author Comments on the symptoms experienced after COVID-19 vaccination Explicit refusal to receive a COVID-19 vaccine	Example 1: I am very glad to have already done my 2 doses of the vaccine, fudge Example 2: I don't want to get vaccinated. Why? Well, you know, we don't know what's in this vaccine, it can be dangerous.