The Coronavirus Corpus is composed of million words of data, and is updated each day.

As an example of how the corpus is growing, there are 11,706,746 new words of text from the last week (21-02-19 through 21-02-25).

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 COVID-19 }.
2. Articles that have one of the following words/strings in the title: at-risk, cases, confirmed, contagious, containm*, coronavirus, covid*, curbside, curve, deaths, disinfect*, distanc*, epicenter, epidemic, epidemiol*, flatten*, flu, high-risk, hoard*, hospital*, hydroxychloroquine, infect*, influenza, isolat*, lockdown, lock-down, mask*, nursing, outbreak, pandemic, panic, patient*, pneumon*, preventative, preventive, quarantin*, re-open*, reopen*, respiratory, sanitiz*, self-isolat*, shelter*, shutdown, spread, spreading, stay-at-home, stay at home, stockpil*, testing, vaccine*, ventilator*, virus.

The following are the number of words, texts, and distinct websites for each 10 day period since 1 Feb 2020 (as well as all of Jan 2020), e.g. 20-04-11 = 20-04-11 through 20-04-20,
 

# WEBSITES # TEXTS # WORDS TOTAL = 0 WORDS
21-02-01 2,361 51,645 41,125,068  (through 21-02-25)
21-01-01 2,428 74,832 56,971,166
20-12-21 1,895 23,184 18,515,035
20-12-21 1,895 23,184 18,515,035
20-12-11 1,710 17,404 13,491,935
20-12-01 1,911 25,295 18,794,894
20-11-21 1,739 19,808 15,029,448
20-11-11 1,822 23,609 18,441,771
20-11-01 1,567 18,535 15,812,409
20-10-21 1,190 21,881 19,643,509
20-10-11 1,226 20,677 17,128,076
20-10-01 1,742 25,799 20,364,085
20-09-21 1,424 23,766 19,965,131
20-09-11 1,393 20,515 17,551,861
20-09-01 1,559 25,225 20,094,109
20-08-21 1,568 28,930 24,087,298
20-08-11 1,609 29,526 24,465,217
20-08-01 1,643 30,774 25,609,175
20-07-21 1,814 36,765 28,652,140
20-07-11 1,514 29,565 22,518,478
20-07-01 1,597 36,976 27,242,994
20-06-21 1,462 34,479 26,832,487
20-06-11 1,448 34,263 27,117,830
20-06-01 1,442 35,552 29,325,348
20-05-21 1,545 45,201 36,075,755
20-05-11 3,893 42,779 30,485,107
20-05-01 3,834 43,540 31,251,367
20-04-21 4,065 48,761 33,801,912
20-04-11 4,329 53,755 35,754,215
20-04-01 4,496 58,083 38,418,292
20-03-21 4,717 77,163 55,529,427
20-03-11 3,977 41,489 26,817,335
20-03-01 3,006 25,830 17,643,504
20-02-21 1,851 9,415 5,728,812
20-02-11 1,279 6,386 4,002,464
20-02-01 1,721 8,377 4,763,161
20-01-01 1,118 2,688 1,436,957