Exposure Profile of Severe Acute Respiratory Syndrome Coronavirus 2 in Canadian Food Sources
Bibliographic record
Abstract
ABSTRACT: A new coronavirus strain known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread worldwide. This virus is the causative agent for coronavirus disease 2019 (COVID-19) and spreads primarily through human-to-human transmission via infected droplets and aerosols generated by infected persons. Although COVID-19 is a respiratory virus, the potential for transmission of SARS-CoV-2 via food is considered theoretically possible and remains a concern for Canadian consumers. We have conducted an exposure assessment of the likelihood of exposure of SARS-CoV-2 in Canadian food sources at the time of consumption. This article describes the exposure routes considered most relevant in the context of food contamination with SARS-CoV-2, including contaminated food of animal origin, other contaminated fresh foods, fomites, and SARS-CoV-2-contaminated feces. The likelihood of foodborne infection of SARS-CoV-2 via the human digestive tract also was considered. Our analysis indicates that there is no evidence that foodborne transmission of SARS-CoV-2 has occurred, and we consider the likelihood of contracting COVID-19 via food and food packaging in Canada as low to remote. Adherence to safe food practices and cleaning procedures would in any case prevent a potential foodborne infection with SARS-CoV-2.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".