![]() ![]() Each series of concentrations of N1 and N2 genes found in the wastewater of each location was standardized using the gene and location specific standard deviation. The province-wide COVID-19 wastewater signal for Ontario is a weighted mean of standardized, biomarker-normalized concentrations of SARS-CoV-2 gene copies across 103 wastewater treatment plants, pumping stations and sewersheds in the 34 public health units. The apparent trend towards a decrease in protection against hospital and ICU admission associated with at least 2 vaccine doses from March 2022 onwards is at least partially explained by increasing immunity of unvaccinated people with a history of recent infection. The estimated protection is 1 minus the age-standardized rate ratio comparing people who have received at least 2 doses of a COVID-19 vaccine with people who have not yet received a COVID-19 vaccine, and is expressed as a percentage. All estimates are updated daily. Hospital occupancy includes patients in ICU. Mobility Indicators of High-Risk Activities in OntarioĮstimates are age-standardized using Ontario’s current population and a single age cut-off to take into account differences in vaccine uptake and the risk of severe disease between children, adolescents and young adults (0-29 years) and remaining adults (30+ years). The currently available data do not allow for a more granular age standardization.Estimates are based on (1) 7-day averages of the proportions of fully vaccinated and unvaccinated patients hospitalized on wards and ICUs reported in Ontario’s daily surveys, and of fully vaccinated and unvaccinated cases (2) on COVID-19 hospital and ICU occupancy and the 7-day average of COVID-19 cases in Ontario and (3) on Ontario’s age-specific vaccination data 7 days before. Mobility Indicators of Low-Risk Activities in Ontario Oxford Stringency Index and Out-of-Home Mobility in Ontario Number of Public Health Units With Exponential Growth in Ontarioĭaily COVID-19 Hospital and ICU Occupancy in Ontario ![]() ![]() Percentage of Cases Caused by Different Variants in Ontario Test Positivity and Number of COVID-19 Tests in OntarioĮffective Reproduction Number R(t) in Ontario ContentsĬurrent COVID-19 Risk in Ontario by Vaccination StatusĮstimated Rate of COVID-19 Cases per 1 Million Inhabitants per Day in Ontario *Currently, R(t) based on cases cannot be estimated accurately because the testing capacity in Ontario is insufficient to deal with the number of infections caused by Omicron, and the testing strategy has changed. All estimates are updated daily.Ĭolour codes are adapted from Ontario’s original COVID-19 response framework: green – prevent yellow – protect orange – restrict red – control. Estimates are based on (1) 7-day averages of the proportions of fully vaccinated and unvaccinated patients hospitalized on wards and ICUs reported in Ontario’s daily surveys, and of fully vaccinated and unvaccinated cases (2) on COVID-19 hospital and ICU occupancy and the 7-day average of COVID-19 cases in Ontario and (3) on Ontario’s age-specific vaccination data 7 days before. The currently available data do not allow for a more granular age standardization. The doubling time is the estimated time required in days until the current number of cases or the wastewater signal doubles, the halving time is the estimated time required in days until the current number of cases or the wastewater signal halves.Įstimates by vaccination status are age-standardized using Ontario’s current population and a single age cut-off to take into account differences in vaccine uptake and the risk of severe disease between children, adolescents and young adults (0-29 years) and remaining adults (30+ years). Change per week is the change as compared with 7 days previously. An R(t) of greater than 1 indicates exponential growth. The effective reproduction number R(t) corresponds to the average number of additional infections caused by 1 infection. The variants without N501Y mutation (N501Y-) and without E484K mutation (E484K-) include Delta (B.1.617.2) the Wild Type was the most frequent N501Y-/E484K- variant until April 2021, Delta is the most frequent N501Y-/E484K- variant in Ontario now. The variants with N501Y mutation (N501Y+) include Alpha, Beta, Gamma and Omicron the variants with E484K mutation (E484K+) include Beta and Gamma Omicron is the most frequent N501Y+ variant in Ontario now. The estimated number of deaths per day is based on the latest 7-day midpoint average. The estimated number of cases per day, rate and percentage are predicted 7-day midpoint averages based on the latest observed 7-day midpoint average of the number of cases per day and the latest observed 3-day average of R(t).
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