At enrolment visit, information on demographic characteristics (biological sex, gender, age, ethnicity, education level), job characteristics (job title or rank or role, years of experience, employing service), workplace stress, workplace controls characteristics (controls in place before COVID-19, changes in controls throughout the pandemic, self-reported use or adherence of controls, perceptions of control effectiveness), COVID-19 experiences (testing history and results, symptom history, time off work or job losses due to COVID-19, an estimation of the number or proportion of patients interacted with confirmed or suspected COVID-19), job tasks (including frequency of potentially “high-risk” procedures including tracheal intubation and other airway procedures, nebulized medication delivery, chest compressions, and defibrillation), and non-occupational potential risk factors (use of public transportation, COVID positive household family members, frequent use of enclosed public spaces such as restaurants) was collected. Blood samples were collected for serology testing. If participants experienced a COVID-19 infection after vaccination (indicating a vaccine failure), extra blood sample procurement would be collected to perform immunity measures.

Information on changes in job characteristics (job title or rank or role, employing service), workplace stress and aspects related to mental health, workplace controls characteristics (changes in controls throughout the pandemic, self-reported use or adherence of controls, perceptions of control effectiveness), COVID-19 experiences (testing history and results, symptom history, time off work or job losses due to COVID-19, an estimation of the number or proportion of patients they interacted with confirmed or suspected COVID-19), job tasks (frequency of potentially “high-risk” procedures including tracheal intubation and other airway procedures, nebulized medication delivery, chest compressions, and defibrillation), and non-occupational potential risk factors (use of public transportation, COVID positive household family members, frequent use of enclosed public spaces such as restaurants) was collected. Blood samples are collected for serology testing. If participants experienced a COVID-19 infection after vaccination (indicating a vaccine failure), extra blood sample procurement would be collected to perform immunity measures.

Information on demographic characteristics (biological sex, gender, age, ethnicity, education level), job characteristics (job title or rank or role, years of experience, employing service), workplace stress, workplace controls characteristics (controls were in place before COVID-19, changes in controls throughout the pandemic, self-reported use or adherence of controls, perceptions of control effectiveness), COVID-19 experiences (testing history and results, symptom history, time off work or job losses due to COVID-19, an estimation of the number or proportion of patients they interacted with confirmed or suspected COVID-19), job tasks (frequency of potentially “high-risk” procedures including tracheal intubation and other airway procedures, nebulized medication delivery, chest compressions, and defibrillation), and non-occupational potential risk factors (use of public transportation, COVID positive household family members, frequent use of enclosed public spaces such as restaurants) was collected. Blood samples were collected for serology testing.

A routinely collected details of all patient encounters including the treating paramedic, the patient, all procedures performed and personal protective equipment (PPE) worn and the COVID- screen were collected in a British Columbia Emergency Health Services database. These data are linked to Population Data BC to identify all patients and paramedics who were: (a) diagnosed with COVID-19; and, (b) those who had influenza-like illness (ILI)-related healthcare encounters (within 10 days of the encounter), using ICD-9 codes.

Information on ages of non-positive and positive employees working at BC Children’s and Women’s Hospital (BCCWH) as well as total number of employees; the age of each employee; and which of these employees tested positive for COVID-19 (and the data of the test, date of diagnoses was collected.