Table 2.

Main positive and negative topics, with highest weighted words, illustrative tweets, and the number of tweets containing the weighted word.

ID			Topics		Weighted words identified by the neural network		Example of an original tweet		Number of tweets containing weighted words for each topic
Negative topics
	1	International situation		italian, china, eu, euro, italy, politican1, politicalParty1, politicalParty2, politician2, president, government, politician3, incompetence, fascist		Italy is already today worse affected by Covid-19 than China. (...)		11,297
	2	Economy		job, impact, industry, yougov, hire, financial, market, livelihood, diarrhea, recession, economy		(...) The markets are trash, every industry is freaking out, and people are losing their jobs because it’s stalling the economy and no one is hiring. (...)		3486
	3	Media and social media		media1, media2, american		Signed out of my media1. (...) Media2 is a HORRIBLE thing to be on with this damn Coronavirus (...)		1428
	4	Media and social media		media1, media2, american		Can the media be declared enemies of the people? They (...) lie to us, (...) and fail to report news/statistics that Americans need to know. (...)
	5	Medical situation		ventilator, paramedic, triage, ration, supply		The (...) most dreadful thing we might face is rationing or triaging who gets ventilators. Emergency rooms across the U.S (...) have limited capacity and supplies (...)		1411
	6	Public health measures		stay, senior, travel, indoor, cancel, ban		The EU travel ban (...) I must admit is terrible decision extremely terrible (...)		8396
	7	COVID-19 origin		coronavirusHoax, fake, conspiracy, propaganda		(...) the Fake News Media are fabricating the hype and panic to destroy the economy (...) #Pandumbic #coronavirusHoax		1680
Positive topics
	8	International situation		italy, nhs, democracy, gov, politician4		(...) Freer and more democracy countries can do this if they take needed measures.		2178
	9	Economy		client, colleague, customer, company		We would like to extend our heartfelt appreciation to all of our clients and partners working on the front-lines (...)		745
	10	Medical situation		mask, research, health, healthy, resources, healthcare, doctor, applause, hero		Put all your money and resources into getting the cure for the Coronavirus you look like a hero and win the election		4803
	11	Public health measures		stay, control, announce, interpersonal, family, canceleverything, relative, country, precaution, sanitation, icu, measures, prevention, protect		Good graphic on social distancing and how it can help healthcare capacity, especially important for a country like ours with minimal quality ICU #pandemia #coronavirus #KoronawirusWPolsce #koronavirus #koronawirus		6642
	12	Mutual aid and cooperation		collaborative, together		(...) Communities who work together to ensure the health and well-being of their fellow neighbor will be stronger and healthier than those who don’t. #Coronavirus		470