Four confirmed cases of Legionnaires’ disease in the Grimsby area are being investigated by health officials, the BBC has reported.
Public Health England said no common links have been identified between the infected people.
Dr Simon Padfield, from PHE in Humberside, said “all four patients are currently recovering”.
Legionnaires’ disease is a rare form of pneumonia that is transmitted by inhaling contaminated water droplets, with up to 15% of cases proving fatal.
Dr Padfield said the outbreak was first identified on 27 July but no source had yet been confirmed.
The 11th annual Combatting Legionella & Water Treatment conference, willtake place on 24-25 September at Holte Suite, Aston Villa Park, Birmingham.
The conference is a comprehensive and cutting-edge event that will ensure engineering and facilities management teams are able to prevent legionella bacteria and comply with water safety regulation.