COVID-⁠19 Switzerland

Information on the current situation, as of 30 May 2023

The key figures will be published each Tuesday at 15:30.

Epidemiological course,Switzerland

Outpatient consultations with suspected COVID-⁠19

The data published here are based on information from the Sentinella reporting system. This system serves to monitor transmissible acute diseases as well as research in the area of family medicine. Around 160 to 180 doctors working in the outpatient sector participate in the Sentinella reporting system on a voluntary basis. Since March 2020, they have been transmitting information to the FOPH on initial outpatient consultations held with patients with suspected COVID-⁠19 at medical practices and during home visits. Based on these reports, the number of such consultations is estimated on a weekly basis (extrapolation).

Around one-⁠third of Sentinella doctors send a nasopharyngeal swab from some of their patients with suspected COVID-⁠19 to the National Reference Centre for Influenza (NRCI) for laboratory diagnostics. Since the end of September, the NRCI has also been testing the swabs for SARS-⁠CoV-⁠2, RSV and other respiratory viruses (include adenoviruses, bocaviruses, other coronaviruses (229E, HKU1, OC43), metapneumoviruses parainfluenza viruses (1–4), and rhinoviruses) in addition to influenza. Based on this data, the distribution of circulating respiratory viruses is estimated each week.

The definition of what constitutes a suspected COVID-⁠19 case changed during the course of the pandemic. Since October 2022, all acute respiratory illnesses, defined as “illnesses with an acute onset that involve coughing, a sore throat, shortness of breath or runny nose AND which are of infectious origin as assessed by a doctor”, are considered suspected COVID-⁠19. This definition is consistent with the definition of an “acute respiratory infection” used by the WHO, which recommends it for the sentinel surveillance of COVID-⁠19. Until the end of September 2022, suspected COVID-⁠19 cases were identified in line with clinical suspicion as per notification obligation.
The reporting week in the Sentinella reporting system corresponds to the week of the initial consultation and runs from the Saturday of the previous week until Friday.

The desired period can be selected using the slider beneath the graphic.

Development of the consultations over time

Outpatient consultations, Switzerland, 21.03.2020 to 19.05.2023

The illustration shows the development over time of the weekly number of initial consultations of patients with suspected Covid (acute respiratory illness) in doctor's offices or during home visits. Depending on the selection, it is shown in relation to the population (extrapolation) or to the total number of consultations by Sentinella doctors.
Consultations with suspected Covid-⁠19
Source: FOPH – Status: 30.05.2023, 06.01h

Development of virus distribution over time

Detected respiratory viruses, Switzerland, 26.09.2020 to 19.05.2023

The diagram shows the development over time of the respiratory viruses detected each week by the National Reference Centre for Influenza in the nasopharyngeal swabs of outpatients with suspected COVID-⁠19. Depending on the selection, the line chart shows the share or the absolute number of detected respiratory viruses. The bar chart shows the number of fully tested samples (nasopharyngeal swabs). The individual bars are divided into samples in which at least one virus was detected (positive) and samples in which none of the viruses tested for was detected (negative). For the individually selected respiratory viruses, the weekly values are shown with an upper and lower value, which represent a probability for the weekly value of 95%.
Sample testing
Source: FOPH (Monitoring) – Status: 30.05.2023, 06.01h