Big Brother: Over the Top told its houseguests the outcome of the 2016 presidential election, and the 2001 season of the flagship show did tell the house about the events of 9/11.
In the past, information has been given to houseguests in America if there’s an illness or accident that affects one of their family members.
German newspaper Sueddeutsche (via The Guardian) confirmed that German houseguests have not been made aware of the coronavirus situation, and the information blackouts are only lifted by producers in certain circumstances.