The evolution of SARS-CoV-2 seroprevalence in Canada: a time-series study, 2020–2023

TJ Murphy, H Swail, J Jain, M Anderson, P Awadalla… - CMAJ, 2023 - Can Med Assoc
Background: During the first year of the COVID-19 pandemic, the proportion of reported
cases of COVID-19 among Canadians was under 6%. Although high vaccine coverage was …

Estimated SARS-CoV-2 antibody seroprevalence trends and relationship to reported case prevalence from a repeated, cross-sectional study in the 50 states and the …

RE Wiegand, Y Deng, X Deng, A Lee… - The Lancet Regional …, 2023 - thelancet.com
Background Sero-surveillance of severe acute respiratory syndrome coronavirus 2 (SARS-
CoV-2) can reveal trends and differences in subgroups and capture undetected or …

Riding high: seroprevalence of SARS-CoV-2 after 4 pandemic waves in Manitoba, Canada, April 2020–February 2022

S Duong, J Burtniak, A Gretchen, A Mai, P Klassen… - BMC Public Health, 2023 - Springer
Background Canada is emerging from the largest SARS-CoV-2 Omicron wave to date, with
over 3.3 million confirmed cases. Unfortunately, PCR confirmed cases illuminate only a …

[HTML][HTML] Population immunity to pre-Omicron and Omicron SARS-CoV-2 variants in US states and counties through December 1, 2021

F Klaassen, MH Chitwood, T Cohen, VE Pitzer, M Russi… - medRxiv, 2022 - ncbi.nlm.nih.gov
Prior infection and vaccination both contribute to population-level SARS-CoV-2 immunity.
We used a Bayesian model to synthesize evidence and estimate population immunity to …

[HTML][HTML] SARS-CoV-2 seroprevalence during the first and second pandemic waves in Canada

X Tang, A Sharma, M Pasic, P Brown, K Colwill… - 2021 - europepmc.org
Background: The prevalence of infection in Canada's COVID-19 viral waves, the predictors
of infection, and the durability of antibody responses to infection remain undocumented …

[HTML][HTML] Dynamics of SARS-CoV-2 seroprevalence in a large US population over a period of 12 months

M Karkanitsa, Y Li, S Valenti, J Spathies, S Kelly… - medRxiv, 2023 - ncbi.nlm.nih.gov
Due to a combination of asymptomatic or undiagnosed infections, the proportion of the
United States population infected with SARS-CoV-2 was unclear from the beginning of the …

[HTML][HTML] Pre-Omicron seroprevalence, seroconversion, and seroreversion of infection-induced SARS-CoV-2 antibodies among a cohort of children and teenagers in …

K Zinszer, K Charland, L Pierce, A Saucier… - International Journal of …, 2023 - Elsevier
Objectives To use serological testing to assess the pre-Omicron seroprevalence,
seroconversion, and seroreversion of infection-induced SARS-CoV-2 antibodies in children …

Pre-vaccine positivity of SARS-CoV-2 antibodies in Alberta, Canada during the first two waves of the COVID-19 pandemic

CL Charlton, LT Nguyen, A Bailey, J Fenton… - Microbiology …, 2021 - Am Soc Microbiol
We systematically evaluated SARS-CoV-2 IgG positivity in a provincial cohort to understand
the local epidemiology of COVID-19 and support evidence-based public health decisions …

[HTML][HTML] Seroprevalence of infection-induced SARS-CoV-2 antibodies—United States, September 2021–February 2022

KEN Clarke - MMWR. Morbidity and mortality weekly report, 2022 - cdc.gov
In December 2021, the B. 1.1. 529 (Omicron) variant of SARS-CoV-2, the virus that causes
COVID-19, became predominant in the United States. Subsequently, national COVID-19 …

Increasing SARS-CoV2 cases, hospitalizations, and deaths among the vaccinated populations during the Omicron (B. 1.1. 529) variant surge in UK

VR Emani, VK Pallipuram, KK Goswami, KR Maddula… - medRxiv, 2022 - medrxiv.org
ABSTRACT BACKGROUND There were increased SARS-CoV2 hospitalizations and deaths
noted during Omicron (B. 1.1. 529) variant surge in the UK despite decreased cases, and the …