Parts of Worthing Hospital were closed after a patient was confirmed to have flu on Tuesday.
Worthing Hospital confirmed at 1.30pm it had one case of the ‘highly contagious’ virus.
A hospital spokesman said a ‘small number of bays’ – rooms in wards – had been closed ‘as a precaution’, including on Clapham ward and the Emergency Floor, ‘while further testing was undertaken’.
Dr Tim Taylor, medical director at the trust which runs Worthing Hospital, said: “If you have had flu-like symptoms, or indeed any other potentially infectious illness, we ask you not to come into our hospitals until 48 hours after symptoms have cleared – unless it is an emergency.
“This will help us to protect our patients, many of whom are particularly susceptible to highly contagious viruses such as influenza.
“We thank you for your support.”