Eight police officers in west Berkshire have tested positive for coronavirus, their force has confirmed.
Thames Valley Police said on Tuesday the officers and other people who had close contact with them are self-isolating.
Other officers have been brought in to cover their absence.
Assistant Chief Constable Christian Bunt said it is "not having any impact" on the service the force provides.
He said early action was taken "in order to minimise the spread of the virus".