Number of reported cases of RSV, COVID-19 and flu in 2025-2026 (Week 6); Credit: MSSS

On Thursday 12 February 2026, the Health Directorate of Luxembourg's Ministry of Health and Social Security published its weekly overview of the evolution of major acute respiratory infections, including COVID-19, influenza (flu) and respiratory syncytial virus (RSV) for the week of Monday 2 to Sunday 8 February 2026 (week 6).

Drop in flu cases

During week 6, the number of flu cases reported by laboratories decreased from 636 to 544, a 14% drop compared to the previous week. Despite this fourth consecutive week of decline, the virus continues to circulate widely.

During the last week, influenza A accounted for 99.2% of cases, while influenza B represented 0.8%.

The Ministry of Health and Social Security recalled that vaccination is still available. This vaccination recommendation primarily concerns people aged 65 and over, who are at the highest risk of complications from the flu. The ministry noted that vaccination remains the most reliable way to prevent seasonal flu and reduce the risk of associated complications.

Decrease in RSV cases

The number of RSV cases decreased by 12% over one week, from 101 to 89. Since October 2025, 55% of infections have involved children under the age of ten, indicating that the virus primarily affects younger people.

Decrease in COVID-19 / SARS-CoV-2 cases

The number of positive COVID-19 cases decreased from 84 to 73, down by 13% compared to the previous week. Meanwhile, the viral concentration detected in wastewater increased slightly.

The latest available sequencing data reveals that the XFG variant (45.5%), its sub-variant XFG.3 (26.7%) and the NB.1.8.1 variant (18.2%) are predominant.

The ministry recommended the following preventative measures to limit the spread of viruses:

  • wash hands regularly with soap and water for 30 seconds, thoroughly rubbing the palms, fingers, backs of hands and under the nails;
  • cover the mouth and nose with a tissue when coughing or sneezing - or use the crook of the elbow;
  • throw used tissues immediately in the rubbish bin and then wash one's hands;
  • avoid physical contact such as hugs, kisses and handshakes;
  • avoid crowds and gatherings during the epidemic season;
  • stay home if sick to avoid infecting others;
  • ventilate rooms regularly, at least three to four times a day for ten minutes.