The Coronavirus Corpus is composed of 1,492,979,248 words of data in 1,873,327 from January 2020 - December (31st) 2022.

We have decided not to extend the corpus beyond Dec 2022, because in virtually every country (with one major exception), COVID is pretty much under control, and there are now relatively few newspaper articles about the pandemic. If you are interested in data after December 2022, feel free to use the NOW corpus, and simply limit your search to COVID-related topics.

The Coronavirus Corpus contains a subset of the NOW Corpus. The new articles in the NOW Corpus (about 10,000 articles each day) come from links harvested from hourly Bing News searches, as well as searching 1,000+ websites to find articles that have appeared in the previous 24 hours. We then download the texts, clean them up with JusText (to remove boilerplate material); tag and lemmatize them; and then integrate them into our existing relational database architecture.

As mentioned, the Coronavirus Corpus is a subset of the NOW Corpus -- articles dealing in some way with the coronavirus. There are two methods to find these articles:

1. Articles that have at least two occurrences of the words { coronavirus, COVID*, or pandemic* }.
2. Articles that have one of the following words/strings in the title: { coronavirus, COVID*, or pandemic* }.

The following are the number of words, texts, and distinct websites for each of the 36 months in the corpus (Jan 2020 - Dec 2022).

# WEBSITES # TEXTS # WORDS TOTAL = 0 WORDS
20-01 2,310 12,574 7,340,233
20-02 2,636 24,178 14,494,437
20-03 5,933 144,482 99,990,266
20-04 6,225 160,599 107,974,419
20-05 5,248 131,520 97,812,229
20-06 1,844 104,294 83,275,665
20-07 2,118 103,306 78,413,612
20-08 2,031 89,230 74,161,690
20-09 1,964 69,506 57,611,101
20-10 2,061 68,357 57,135,670
20-11 2,262 61,952 49,283,628
20-12 2,420 65,883 50,801,864
21-01 2,428 74,832 56,971,166
21-02 2,411 56,103 45,191,176
21-03 3,724 68,563 58,286,852
21-04 2,346 64,999 51,301,395
21-05 2,233 62,330 49,119,113
21-06 2,207 56,038 40,039,331
21-07 2,154 51,792 38,740,273
21-08 2,044 52,279 41,821,384
21-09 2,085 47,898 37,416,152
21-10 1,984 40,733 33,838,525
21-11 1,875 41,516 33,866,628
21-12 1,987 54,626 42,167,130
22-01 2,107 77,579 58,414,235
22-02 1,907 42,989 34,357,821
22-03 1,640 29,870 25,246,360
22-04 1,084 28,752 24,946,323
22-05 1,113 26,092 22,250,946
22-06 930 22,848 18,630,103
22-07 1,056 24,367 20,619,365
22-08 1,120 21,577 19,140,381
22-09 915 16,899 15,515,618
22-10 874 15,099 13,608,839
22-11 765 15,697 14,410,411
22-12 794 17,586 15,281,307