Respiratory tract infections: New COVID-19 cases: week 41 review - 9 to 15 October 2023

The weekly review provides a summary of the evolution of acute respiratory infections, including COVID-19 and influenza.


From 9 to 15 October 2023 (week 41), the number of people testing positive for COVID-19 dropped to 347 cases, compared to 365 cases the previous week (-5%). The positivity rate fell to 23% compared with 25% the previous week.

These 2 clinical indicators suggest that a peak in the circulation of SARS-CoV-2 has recently been reached.

The viral concentration detected in waste water had been rising in recent weeks [1].

Recent sequencing data showed a preponderance of the EG.5.1 variant (38.7%) [2].


For the week of 9 to 15 October 2023 (week 41), the number of influenza cases reported by laboratories fell to 1, compared with 5 the previous week.

These data largely overlap with LNS sentinel surveillance, which indicates increased circulation of rhinoviruses and SARS-CoV-2, but little circulation of influenza viruses. [2]

Press release by the Ministry of Health




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