Transmission Modelling

A QMRA model developed at IOM, the COVID-19 Exposure Model and Risk App (CEMRA), initially used to explore infection risk to healthcare workers (funded by the CSO), was adapted to examine infection risk in an office setting. In both settings, CEMRA was used to estimate the relative contribution of the different routed of exposure and to compare the potential effect of different interventions on infection risks. We have updated model parameters and conducted sensitivity analyses using measurements, literature reviews and re-analysis of other datasets (e.g. Human Challenge Study). Work was initiated in April 2021 and will be completed by December 2022.

Tools and resources:

Covid-19 controls visualisation:


Covid Exposure Model and Risk App (CEMRA):

For any enquiries, please contact

For this research project, IOM have been working in collaboration with University of Leeds, Defence Science and Technology Laboratory, Health and Safety Executive, University of Manchester. 

This study sits under theme 2 part of the wider PROTECT COVID-19 National Core Study. To find out more click here.

  • IOMworld Posted: 7 days ago
    Read the independent report on #COVID and Occupational Impacts from the UK Injuries Advisory Council. IOM's John Ch…
  • IOMworld Posted: 12 days ago
    RT @therealfclabs: A week today! Free webinar - panel discussion and audience questions. Be part of the conversation.
  • IOMworld Posted: 13 days ago
    Improving understanding of gloves & dermal exposure to chemicals for professionals everywhere, IOM’s Karen Galea &…
  • IOMworld Posted: 14 days ago
    RT @EU_OSHA: Systematic, holistic approach to #riskAssessment, covering both physical and psychosocial risks. This should actively involve…
  • IOMworld Posted: 15 days ago
    Sharing our knowledge on Respirable Crystalline Silica, check out our advice and expertise in a recent published ar…
  • IOMworld Posted: 20 days ago
    As Airmon 2022 has now come to an end, we wish to thank everyone for visiting our stand. We have enjoyed meeting &…
  • IOMworld Posted: 21 days ago
    IOM's research has helped to better understand stress and psychosocial issues and how to manage these for safer and…
  • IOMworld Posted: 22 days ago
    IOM improving ventilation for a healthier world. To protect patients, staff & limit the spread of COVID-19, find ou…
  • IOMworld Posted: 22 days ago
    Today! Join the Low Cost Particulate Matter Sensors in the Workplace workshop at 16:00. This workshop will aim to g…
  • IOMworld Posted: 23 days ago
    The Airmon 10 event is now underway. Come & visit our stand where our experts will be delighted to answer your ques…