Weekly review – Week 8 from 19 to 25 February 2024

The weekly retrospective gives a summary of trends in acute respiratory infections, including COVID-19, the flu (influenza virus) and respiratory syncytial virus (RSV).

Trends of the week

COVID-19: Decrease in the number of cases and the positivity rate of COVID-19.

Respiratory syncytial virus (RSV): Stabilisation of the number of RSV cases at a low level.

Influenza: Decrease in the number of influenza cases.


From 19 to 25 February 2024 (week 8), the number of people testing positive for SARS-CoV-2 dropped to 41 cases, compared to 56 cases the previous week (-27%).

The positivity rate fell to 2.6% compared to 3.3% the previous week. The viral concentration detected in the wastewater was similar to the previous week[1].

These indicators suggest that the circulation of SARS-CoV-2 has decreased.

The latest sequencing data available show a preponderance of the JN.1 variant (86.7%) followed by the BA.2.86 variant (11.1%). It should be noted that variant JN.1, a descendant of variant BA.2.86, has predominated since week 47 of 2023. [2]


For the week of 19 to 25 February 2024 (week 8), the number of influenza cases reported by laboratories decreased to 312 cases from 455 cases in the previous week, a decrease of 31% compared to the previous week.

These data largely coincide with LNS sentinel surveillance, which indicates high circulation of the influenza virus [2].

Respiratory syncytial virus (RSV)

For the week of 19 to 25 February 2024 (week 8), the number of respiratory syncytial virus (RSV)-positive individuals reported by laboratories dropped to 11 cases, compared with 12 the previous week, presenting an decrease of 8%. The peak of the epidemic this season was reached in week 50, from 11 to 17 December 2023.

Press release by the Ministry of Health and Social Security


[1] https://www.list.lu/en/covid-19/coronastep/

[2] https://lns.lu/publications/

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