Household transmission of SARS-CoV-2 from unvaccinated asymptomatic and symptomatic household members with confirmed SARS-CoV-2 infection: an antibody-surveillance study

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.

Department of Pediatrics (Bhatt, Plint, Pham Huy, Varshney, Thampi, Alnaji, Zemek), Children’s Hospital of Eastern Ontario, University of Ottawa; Department of Emergency Medicine (Plint, Alnaji, Zemek), University of Ottawa; Children’s Hospital of Eastern Ontario Research Institute (Tang, McGahern, J. Dawson, L. Dawson, Austin), Ottawa, Ont.; Division of Infectious Diseases (Malley), Boston Children’s Hospital and Harvard Medical School, Boston, Mass.; Department of Biochemistry, Microbiology and Immunology (Pelchat, Arnold, Galipeau, Langlois), Faculty of Medicine, University of Ottawa; University of Ottawa Centre for Infection, Immunity and Inflammation (Pelchat, Langlois); Ottawa Hospital Research Institute (Austin), Ottawa, Ont.