In a study now published in BMJ Open, Drs. Pascal Lavoie and Louise Mâsse and their team at the University of British Columbia found that school staff were not at increased risk of SARS-CoV-2 infection at school, compared to the local community, in the 2020-2021 academic school year.
Using various serological assays in parallel on the same set of samples can produce inconsistent results. A solution is to use composite reference standards and latent class analysis to help decipher true seropositivity.
In their CITF-funded research, Dr. Prabhat Jha and his team leading the Action to Beat Coronavirus (Ab-C) study estimated cumulative seroprevalence of SARS-CoV-2 during the first two viral waves.
This is a summary, written by members of the CITF Secretariat, of: Charlton CL, Nguyen LT, Bailey A, Fenton J, Plitt SS, Marohn C, Lau C, Hinshaw D, Lutsiak C, Simmonds K, Kanji JN, Zelyas N, Lee N, Mengel M, Tipples G. Pre-Vaccine Positivity of SARS-CoV-2 Antibodies in Alberta, Canada during the First Two [...]
The month of June saw many Canadians rolling up their sleeves for a COVID-19 vaccine. The latest results from the Canadian Blood Services’ serosurvey reflect this, with vaccine-induced seroprevalence soaring to 86% across Canada (excluding the Territories and Quebec), up from 60% the month prior. Most importantly, the gap in vaccine coverage among socioeconomic [...]
CITF-funded SeroTracker carried out a living systematic review of 968 seroprevalence studies that included 9.3 million participants in 74 countries.
Drs. Pascal Lavoie and Louise C. Mâsse and their team at the University of British Columbia have released interim results, soon to be submitted for peer-review, suggesting that school staff are not at increased risk of SARS-CoV-2 infection at school, compared to in the community.
SeroTracker is an online tool that tracks and visualizes global COVID-19 serology testing data – testing that examines blood samples for antibodies that indicate a person has been exposed to the novel coronavirus. SeroTracker was initiated in early April 2020 to serve the COVID-19 Immunity Task Force’s need for global serological testing data as [...]
Serosurveillance survey shows SARS-CoV-2 infections growing much faster in poorer neighbourhoods and amongst racialized populations Results from the latest Canadian Blood Services/COVID-19 Immunity Task Force (CITF) collaborative nine-province seroprevalence study confirm that the pandemic is increasingly affecting poorer neighbourhoods and racialized populations. The inequalities in risk in getting COVID-19 were identified early in the pandemic [...]
View a table of Canadian seroprevalence estimates from Canadian Blood Services for May 2020 to January 2021. Links to full reports available as well.