According to CNBC, The New York Stock Exchange (NYSE) will close its trading floors and switch to electronic-only mode in response to the coronavirus (COVID-19) threat.

The decision came after two people, screened at the entrance of its building showed positive results for the COVID-19 test. The firm began pre-emptively testing employees and building entrants for the virus this week.

The two who tested positive were initially denied entry to the building and have not entered since. The NYSE‘s offices, colloquially known as The Big Board, were also reportedly cleaned the day before testing started.