acute healthcare 1 setting during the peak of the COVID-19 pandemic in London 2 3 Running Title : SARS-CoV-2 air and surface contamination

Title: Investigating SARS-CoV-2 surface and air contamination in an acute healthcare 1 setting during the peak of the COVID-19 pandemic in London 2 3 Running Title: SARS-CoV-2 air and surface contamination 4 5 Authors: Jie Zhou, Jonathan A. Otter, James R. Price, Cristina Cimpeanu, Danel 6 Meno Garcia, James Kinross, Piers R Boshier, Sam Mason, Frances Bolt, Alison H. 7 Holmes, Wendy S. Barclay 8 * Joint first authors 9 Affiliations: 10 1. Department of Infectious Disease, Imperial College London, London, UK, W2 1PG. 11 2. National Institute for Healthcare Research Health Protection Research Unit (NIHR 12 HPRU) in HCAI and AMR, Imperial College London & Public Health England, 13 Hammersmith Hospital, Du Cane Road, W12 0HS. 14 3. Imperial College Healthcare NHS Trust, St. Mary’s Hospital, Praed Street, London, 15 W2 1NY, UK. 16 4. Department of Surgery and Cancer, Imperial College London, London, UK, W2 1NY. 17 18 Corresponding author: Dr Jonathan Otter, Imperial College London, NIHR Health 19 Protection Research Unit, Hammersmith Hospital, Du Cane Road, W12 0HS. Tel: 020 331 20 33271, Email: j.otter@imperial.ac.uk. 21 22