Number of reported cases of RSV, COVID-19 and flu in week ten of 2026; Credit: MSSS

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

Flu cases decrease

The number of flu cases reported by laboratories fell by 63%, from 148 to 55 cases, over one week. This marks the eighth consecutive week of decline. Influenza A accounted for 88% of the typed results and influenza B for 12%.

Low number of cases in RSV cases

The number of RSV cases reported by laboratories stabilised at 43 cases, unchanged from the previous week, while remaining at a low level. Since October 2025, 53% of infections have occurred in children under the age of ten, indicating that the virus mainly affects younger age groups.

Slight decrease in COVID-19 / SARS-CoV-2 cases

During week ten, the number of positive COVID-19 cases decreased from 33 to 24 cases, representing a 27% decrease compared to the previous week. On the other hand, the viral concentration detected in wastewater showed an increase. The latest available sequencing data reveal that the XFG variant (36.5%), variant BA.3.2 (25.2%) and variant NB.1.8.1 (24.5%) are predominant.

The ministry reminded the public of preventative measures to help limit the spread of viruses. These include:

• washing hands regularly with soap and water for at least 30 seconds, thoroughly rubbing palms, fingers, the backs of hands and under the nails;

• covering the mouth and nose with a tissue when coughing or sneezing or using the crook of the elbow if no tissue is available;

• disposing of used tissues immediately in a bin and washing hands afterwards;

• avoiding physical contact such as hugs, kisses and handshakes;

• avoiding crowds and gatherings during the epidemic season;

• staying at home when ill to avoid infecting others;

• ventilating rooms regularly, at least three to four times a day for ten minutes.