How and how fast is the coronavirus spread and what is its medical impact? 94 Citoyens takes stock in 15 graphs on the evolution and trends in the number of clusters, people detected positive for the coronavirus, Covid-19 patients hospitalized and in intensive care, and deaths by age and by department of Ile-de-France -of France.
Barometer updated every week. Data source: Public Health France. Infographic 94 Citizens with Public Table
Last update: Monday, September 28, 2020
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The positivity rate continues to rise
Last week already, the positivity rate for tests had crossed the 5% mark. This week, it has just exceeded 6%. Around 3.5% during the deconfinement, the test positivity rate had fallen below 1% at the beginning of July before gradually rising. It crossed 5% at the beginning of September, 6% in mid-September and exceeds 7% at the end of September. A peak of 8.84% was reached last Monday before dropping back to 7.35% on Friday. We observe
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The weekly number of tests decreasing since the end of August
It should be noted that the number of tests performed each week in Ile-de-France also continues to drop, due to the overcrowding of laboratories, which may partly explain the increase in the positivity rate because the tests are more prioritized.
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20-29 year olds remain the age group that contracts the virus the most, but the proportion of older people is also increasing slightly
In terms of age group, the positive cases detected still mainly concern young people, but less drastically than this summer. The 20-29 age group now represents less than 30% whereas it exceeded 37% at least in August. On the other hand, the proportion of those over forty is increasing slightly, as is that of those over 60. The week of September 21, 80-89 year olds thus represented 1.64% of positive cases (against 1.53% the week before), while the proportion had fallen to 1% in August. Note that from one week to the next, the situation is fairly stable.
This trend remains of course to be put into perspective with the spring data. At this date, the positive cases detected mainly concerned those over 50 years old. Below is the evolution of the proportion per week, since the start of deconfinement.
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The increasing incidence rate in the elderly
This trend is reflected in the incidence rates (proportion of positive cases per 100,000 inhabitants). The graph below thus shows a decrease in the incidence rate of 20-29 year olds and a clear increase of over 90s.
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To measure the evolution of the number of positive cases department by department, select the chosen department below.
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Increasing incidence rate
The incidence rate of Covid-19 per 100,000 inhabitants in Ile-de-France is increasing.
It remains more important in the center of the agglomeration but is also increasing in the outer suburbs
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Incidence rate per 100,000 inhabitants
| Department | Week of September 7 | Week of September 14 |
| Paris (75) | 172,6 | 201,6 |
| Val-de-Marne (94) | 137,5 | 117,8 |
| Hauts-de-Seine (92) | 151,9 | 158,7 |
| Seine-Saint-Denis (93) | 124,7 | 146,4 |
| Val d’Oise (95) | 114,7 | 137,8 |
| Essonne (91) | 70,4 | 77,6 |
| Yvelines (78) | 92,2 | 93,5 |
| Seine-et-Marne (77) | 77,9 | 70,9 |
The number of new clusters continues to increase
72 clusters were reported the week of September 14 against 61 the previous week and less than 40 the week before.
As of September 24, around thirty clusters were under investigation in Ile-de-France, a decrease compared to the previous week.
A total of 423 clusters have been identified in Ile-de-France since deconfinement.
“The region’s clusters mainly affect private and public companies (29.1%), followed by schools and universities (21%) which continue to grow. In September, they represented 46.7% of all clusters. However, only 3.3% of confirmed cases (excluding nursing homes) recorded since May 13, 2020 are attached to a cluster ”, details the latest regional epidemiological bulletin from Public Health France.
Download the latest Public Health France bulletin on cluster surveillance in Ile-de-France.
The number of people newly hospitalized slightly down
After jumping the week of September 14, the number of people entering hospital due to Covid-19 decreased slightly during the week of September 21, with 1,208 new hospitalizations in Ile-de-France against 1,352 the previous week. However, this figure remains clearly below the weeks before (only a few hundred hospitalizations).
The number of patients remains certainly incommensurate with the first wave and has not yet reached the number of patients hospitalized each week at the start of confinement.
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The total number of people hospitalized slightly down
Encouragingly, the total number of people hospitalized in Ile-de-France has decreased slightly, due to the large number of hospital discharges. The patients of the second wave, younger, stay shorter.
Below is the evolution of the total number of people hospitalized in Ile-de-France
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Below is the curve of people discharged from hospital, cumulative since mid-March. This shows a slight acceleration since mid-September.
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And below is the number of people newly discharged from the hospital per week
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The number of people in intensive care continues to increase
The number of people who entered intensive care or intensive care due to Covid-19 in Ile-de-France, on the other hand, continues to increase significantly from one week to the next, with more than 200 people during the last week.
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The total number of people in intensive care for Covid-19 in Ile-de-France exceeds that of the start of confinement
As a result of this progression, the total number of Covid-19 patients in intensive care in Ile-de-France, a number of 339 on September 27 (against 263 on September 18), exceeded that of the start of confinement which was 294 on the 18th. March. However, it remains well below the peak of the first wave. On April 8, the number of Covid patients in intensive care had reached 2,668 in Ile-de-France, more than double the number of places available in principle which is 1,200 in the region, excluding the white plan.
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8,035 people died in the Covid-19 hospital on September 27
The number of people newly deceased from Covid-19 in hospital reached 8,035 on September 27 against 7,951 on September 20, or 84 people in one week, down from 159 the previous week.
(In the diagram below, the large number of patients who died in Essonne the week of September 14 corresponds to a catch-up in the transmission of files from one of the hospitals in this department).
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The peak in the number of people who died from the coronavirus was reached in mid-April. On April 7 alone, 276 people had died from Covid-19 in the region.
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Observatory of Covid-19 hospital data per week in Ile-de-France
The graph below represents new hospitalizations, admissions to intensive care, discharges from hospital and hospital deaths linked to the coronavirus in Ile-de-France, by department. The different filters allow you to select the scope or type of information of your choice.
