This update integrates the data from the eighteenth week of collection, which took place from May 12 to 17, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the seventeenth week of collection, which took place from May 5 to 10, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the sixteenth week of collection, which took place from April 28 to May 3, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the fifteenth week of collection, which took place from April 21 to 26, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the fourteenth week of collection, which took place from April 14 to 19, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the thirteenth week of collection, which took place from April 7 to 12, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the twelfth week of collection, which took place from March 31 to April 5, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the eleventh week of collection, which took place from March 24 to 29, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the tenth week of collection, which took place from March 17 to 22, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the eighth week of collection, which took place from March 3 to 8, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the seventh week of collection, which took place from February 24 to March 1st, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the sixth week of collection, which took place from February 17 to 22, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the fifth week of collection, which took place from February 10 to 15, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the fourth week of collection, which took place from February 3 to 8, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks
This update integrates the data from the third week of collection, which took place from January 27 to february 1st, 2022, with a sample of 3000 respondents representative of the Quebec population and compares them to other collection weeks.
This update integrates the data from the second week of collection, which took place from January 20 to 25, 2022, with a sample of 3001 respondents representative of the Quebec population and compares them to the first week of collection.
We estimate the incidence of COVID-19, which is the number of adult persons who tested positive for COVID-19, either rapid or PCR, or self-diagnosed as having COVID-19 on the basis of symptoms, over a 7-day period. We present a direct sampling estimate on the adult population as well as an indirect sampling estimate based on the network scale-up method.
Our results suggest that during this period 261,863 people tested positive, which is similar to the network scale-up estimates (ranging from 231,967 to 251,706 depending on the method). On a daily basis, these figures indicate that there were an average of 33,000 to 38,000 positive tests per day in Quebec during the period. In addition, 146,567 people report a positive self-diagnosis, which when added to those with a positive test result gives an estimate of 407,430 probable cases of COVID-19 in the adult population (58,144 on average per day). In comparison, INSPQ data report 48,815 positive cases based on PCR tests in Quebec during the same seven-day period (6,973 on average per day). Regardless of the method and estimator used (excluding self-diagnosis), we obtain an incidence that is about five times higher than the official figure. The survey will be repeated over 5 consecutive weeks in order to follow the evolution.
