According to KWR, curves have risen in a number of cities in the past three weeks; in addition to the aforementioned cities of Amsterdam and Utrecht, Tilburg, Rotterdam and Schiphol are also reported. The last measurements of this date from July 15.
Measure of degree of contamination
The concentrations found are a measure of the degree of contamination among the population connected to the examined sewer. The curves correlate with the number of registrations with the GGD and with the number of hospital admissions. The sewage curve reacts about a week earlier than the GGD and the registration of hospital admissions. This is because people infected with coronavirus do not have any symptoms during the first few days, but they do excrete virus through the faeces in the sewer. This makes the sewer an ‘early warning’ system. These data provide a more complete picture of the virus circulation in our country.
It is therefore not surprising that the corona dashboard of the National Government shows that the number of corona cases is increasing in Rotterdam and its environs. 58 people were tested positive in the region on Friday. There were 48 on Thursday and 35 on Wednesday.
Converted to the number of inhabitants, 4.4 people per 100,000 inhabitants tested positive in Rotterdam-Rijnmond on Friday. That is the highest number since April 30. Then the virus was diagnosed in 5.4 out of 100,000 inhabitants.
The number of corona patients in hospitals has fallen below 100 again on Friday. It fell from 106 to 91, according to figures from the National Coordination Center for Patient Distribution. This is because the number of patients in nursing wards fell sharply, from 91 to 74. The number of corona patients in intensive care is stable. It has been 15 to 17 a week.
The Safety Region Rotterdam-Rijnmond includes a total of fifteen municipalities. Besides Rotterdam, these are places such as Capelle aan den IJssel, Schiedam, Vlaardingen and Goeree-Overflakkee. KWR also measures corona residues in the sewage in Amersfoort and Franeker.
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