PHAC Gathering Risks Model: On-line Calculator

Based on a probabilistic model, this online calculator estimates some components of the epidemiological risks associated with gatherings of individuals. Both “one-time” (e.g., weddings, conferences) and recurrent (e.g., schools, workplaces) gatherings are considered. Users can assess the risk of introduction (the chance that at least one infectious individual participates at a gathering) and the risk of transmissions at the gathering. This tool aims to support public health decision-making by disentangling the epidemiological effects of gathering size, cohorts and community prevalence.