What's classed as exposure?

[coronarona]

Deliberately vague.

Someone at work has been diagnosed and is v poorly.

We were working in the same building up until Tuesday. Not working in the same room but shared common areas, kitchen etc.

Should everyone in the building be isolating?

Well I suppose if they coughed or sneezed on surfaces and someone else touched the contaminated surface and then touched their mouth, eyes, nose it would be possible to get it. This link is from 4/3/20

publichealthmatters.blog.gov.uk/2020/03/04/coronavirus-covid-19-what-is-social-distancing/

Coronaviruses can be spread when people with the virus have close, sustained contact with people who are not infected. This typically means spending more than 15 minutes within two metres of an infected person, such as talking to someone for instance