Surveillance of laboratory exposures to human pathogens and toxins, Canada 2020.

Background: The Laboratory Incident Notification Canada surveillance system monitors laboratory incidents reported under the and the . The objective of this report is to describe laboratory exposures that were reported in Canada in 2020 and the individuals who were affected.

Methods: Laboratory incident exposures occurring in licensed Canadian laboratories in 2020 were analyzed.

Assessing the progression of the COVID-19 pandemic in Canada using testing data and time-dependent reproduction numbers.

Objectives: To compare a mathematical tool and time-dependent reproduction number (R) estimates to assess the COVID-19 pandemic progression in a Canadian context.

Methods: Total number of reported cases were plotted against total number of tests for COVID-19 performed over time, with and without smoothing, for Canada and some Canadian provinces individually. Changes in curvature profile were identified as either convex or concave as indicators of pandemic acceleration or deceleration, respectively.