France - Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of January 22, 2025

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Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of December 26, 2024.


Published on December 26, 2024
Updated on December 26, 2024
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Key points

Acute respiratory infections (ARI)

• Increased activity in town and in hospital in all age groups.

Flu

• Sharp increase in all influenza indicators in the city and in hospitals, in all age groups. All regions in epidemic in mainland France. Pre-epidemic in Martinique.

Bronchiolitis

• Decrease in the majority of indicators. Continuation of the epidemic in twelve regions of mainland France, the Antilles, Guyana and Mayotte. Pre-epidemic in Corsica and Reunion.

COVID-19

• Activity generally stable at low levels.

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https://www.santepubliquefrance.fr/maladies-et-traumatismes/maladies-et-infections-respiratoires/grippe/documents/bulletin-national/infections-respiratoires-aigues-grippe-bronchiolite-covid-19-.-bulletin-du-26-decembre-2024

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Excerpt form the PDF link:
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Situation update

In week 51, activity related to acute respiratory infections was significantly increasing in community medicine and in hospitals in all age groups. Hospitalizations after visits to the emergency room were particularly frequent among those aged 65 and over (58% of hospitalizations for acute respiratory infections) and those under 5 (23% of hospitalizations).

In mainland France, all influenza indicators increased sharply in week 51 in all age groups. The A(H1N1)pdm09 and B/Victoria viruses continued to co-circulate. Children under 15 were the most affected in the community and in hospitals, but a marked increase in visits to the emergency room and hospitalizations among people aged 65 and over was observed. In addition, the number of grouped cases attributed to influenza since week 49 was increasing in ESMS. Finally, the proportion of deaths with a mention of influenza among electronically certified deaths increased significantly in S51 (2% vs. 0.9% in S50). All of these indicators reveal an increasing circulation of influenza viruses within the general population, particularly affecting older people, who are particularly vulnerable to influenza.

A decrease in syndromic indicators of bronchiolitis was observed in the community and in hospitals in S51. These elements support the passage of the epidemic peak this week, which will be confirmed in the coming weeks. The epidemic continues to follow a similar dynamic to those of the epidemics preceding the COVID-19 pandemic, with an intensity at a low level compared to these previous epidemics. The RSV (respiratory syncytial virus) positivity rate began to decrease in hospitals, but increased in community medicine. In mainland France, all regions are in an epidemic except Corsica, which became pre-epidemic in W51. In the DROMs, Réunion has been in a pre-epidemic since W50, Guadeloupe and Martinique in an epidemic since W43 and Guyana in an epidemic since the end of July (W31). In Mayotte, the bronchiolitis epidemic began in W49 and was ongoing when Cyclone Chido passed through.

Concerning COVID-19, syndromic indicators remained generally stable in the city and in the hospital compared to the previous week. The positivity rate for SARS-CoV-2 among samples tested in city laboratories and taken by doctors in the city decreased in W51 compared to the previous week, but increased in the hospital. The number of new episodes of ARI in medico-social establishments (EMS) increased in week 50, a trend mainly driven by the increase in episodes related to influenza and RSV. These data have not yet been consolidated.
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Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of January 2, 2025.


Published on January 2, 2025
Updated on January 2, 2025
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Key points

Acute respiratory infections

• Activity has increased significantly in town and in hospital in all age groups.

Flu

• Continued sharp increase in all influenza indicators in the city and in hospitals in all age groups. All regions in epidemic in mainland France. Martinique in epidemic, Guadeloupe and Guyana in pre-epidemic.

Bronchiolitis

• Decrease in the majority of indicators. Continuation of the epidemic in eleven regions of mainland France, the Antilles, Mayotte and Guyana. Pre-epidemic in Corsica and Reunion. Post-epidemic in Île-de-France.

COVID-19

• Activity generally stable at low levels.

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PDF 4.87 MB

https://www.santepubliquefrance.fr/maladies-et-traumatismes/maladies-et-infections-respiratoires/grippe/documents/bulletin-national/infections-respiratoires-aigues-grippe-bronchiolite-covid-19-.-bulletin-du-2-janvier-2025

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From the PDF link above:
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Situation update

In week 52, activity related to acute respiratory infections was significantly increasing in community medicine and in hospital in all age groups. Hospitalizations after emergency visits particularly concerned those aged 65 and over (63% of hospitalizations for acute respiratory infections).

In mainland France, the flu epidemic is intensifying. All flu indicators were still rising sharply in week 52 in all age groups. Children under 15 were the most affected in community medicine and in hospital, and there was a sharp increase in hospitalizations among people aged 65 and over. Compared to the five previous epidemics, the level of intensity in hospital this week went from moderate to high for all ages and to a very high level for those under 15. The number of clustered cases attributed to influenza continued to increase in medico-social establishments (EMS) since W49. In addition, the share of deaths with a mention of influenza among electronically certified deaths increased (3.8% in W52 vs. 1.9% in W51). The positivity rate was increasing sharply in the city and in hospital. The A(H1N1)pdm09 virus was circulating predominantly with co-circulation to a lesser extent of the B/Victoria virus. Overseas, Guadeloupe had moved to pre-epidemic and Martinique to epidemic in week 51. French Guiana moved to pre-epidemic this week.

A decrease in bronchiolitis syndromic indicators was observed in the city and in hospital in W52 for the second consecutive week, confirming the passage of the epidemic peak that occurred in W50 in mainland France. The epidemic continued to follow a similar dynamic to those of the epidemics preceding the COVID-19 pandemic, with a lower intensity than previous epidemics for the youngest infants on hospital indicators. The RSV (respiratory syncytial virus) positivity rate tended to stabilize in hospitals and decreased in community medicine. In mainland France, eleven regions remained in epidemic. Île-de-France moved to post-epidemic in W52 and Corsica remained in pre-epidemic. In the DROMs, Réunion had been in pre-epidemic since W50, Mayotte in epidemic since W49, Guadeloupe and Martinique since W43 and Guyana in epidemic since the end of July (W31).

The syndromic indicators of COVID-19 remained generally stable in cities and hospitals compared to the previous week and at low levels. SARS-CoV-2 positivity rates decreased slightly in community medicine and laboratories and remained stable in hospitals in week 52.

The number of new ARI episodes in nursing homes has been increasing since week 50, a trend mainly driven by the increase in influenza and RSV-related episodes. These data are not yet consolidated.
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Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of January 8, 2025.


Published on January 8, 2025
Updated on January 8, 2025
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Key points

Acute respiratory infections (ARI)

• Activity still increasing in town and in hospital for all ages.

Flu

• Continued increase in influenza activity in mainland France with an exceptionally high level of intensity in hospitals. Martinique and Guadeloupe in epidemic. Guyana and Mayotte in pre-epidemic.

Bronchiolitis

• Decrease in all indicators. Continuation of the epidemic in eleven regions of mainland France, in the Antilles, in Guyana and in Mayotte. Pre-epidemic in Corsica. Post-epidemic in Île-de-France.

COVID-19

• Stable syndromic activity at low levels. Decrease in positivity rate in city, hospital and wastewater.

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PDF 3.21 MB

https://www.santepubliquefrance.fr/maladies-et-traumatismes/maladies-et-infections-respiratoires/grippe/documents/bulletin-national/infections-respiratoires-aigues-grippe-bronchiolite-covid-19-.-bulletin-du-8-janvier-2025

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From the PDF link above:
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Situation update

In week 01, activity related to acute respiratory infections was increasing in general practice and in hospitals in all age groups except for those under 15. This increase was mainly driven by influenza activity.

In mainland France, the influenza epidemic was increasing in S01. In the city, the increase in activity was less significant compared to the previous two weeks, probably linked to the holiday period. On the other hand, in hospitals, a sharp increase in indicators was still observed in all age groups except for those aged 5-14. The share of hospitalizations for influenza/influenza-like illness among all-cause hospitalizations was at an exceptionally high level of intensity compared to previous seasons. In medical-social establishments, the number of grouped cases attributed to influenza continued to increase. In addition, the share of deaths with a mention of influenza among electronically certified deaths was still rising sharply (6.0% in S01 vs. 3.9% in S52). The A(H1N1)pdm09 virus was still most often detected but the B/Victoria and A(H3N2) viruses were also actively circulating. Virus characterization analyses indicated that the A(H1N1)pdm09 and B/Victoria viral strains currently circulating in France are related to the strains present in the 2024-25 influenza vaccines. However, these data will have to be compared with the first estimates of vaccine efficacy in real life that will be available soon. Overseas, Guadeloupe and Martinique were in an epidemic in S52. French Guiana and Mayotte were in a pre-epidemic situation.

A decrease in bronchiolitis syndromic indicators was observed in the city and in the hospital in S01 for the third consecutive week. The epidemic peak occurred in S50 in mainland France. The epidemic continued to follow a dynamic similar to that of the epidemics preceding the COVID-19 pandemic, with a lower intensity for the youngest infants in hospital at this stage of the epidemic.

The RSV (respiratory syncytial virus) positivity rate decreased in both community medicine and hospital. In mainland France, eleven regions remained in epidemic, Île-de-France in post-epidemic and Corsica in pre-epidemic. In the DROMs, Guadeloupe and Martinique had been in epidemic since S43, Mayotte since S49 and Guyana since the end of July (S31). Réunion had returned to a baseline level in S01. COVID-19 syndromic indicators remained generally stable in the city and in the hospital in W01 compared to the previous week and at low levels. SARS-CoV-2 positivity rates decreased in the city and in the hospital. A decrease in the SARS-CoV-2 monitoring indicator in wastewater was observed.

The number of new episodes of ARI in medico-social establishments (EMS) increased in W51 and W52, a trend mainly driven by the increase in the number of episodes related to influenza and, to a lesser extent, to RSV. These data are not yet consolidated.

Vaccination remains the best way to protect against influenza and COVID-19, particularly severe forms of these diseases. It is essential to recommend vaccination to all eligible people, in order to protect them and those around them: people aged 65 and over; people over 6 months old, with comorbidities with a high risk of severe disease; immunocompromised people; pregnant women; residents in follow-up care facilities or medico-social facilities regardless of their age, as well as people living in the entourage or in regular contact with people who are immunocompromised or vulnerable to severe forms of infection, including health professionals. The passive immunisation campaign for newborns against RSV infections is underway. Two strategies are possible: either vaccination of pregnant women to protect newborns or infants under 6 months of age or immunisation of infants with a monoclonal antibody.

In addition to existing vaccinations and preventive treatments, the adoption of barrier gestures remains essential to protect oneself from all winter illnesses: washing hands, ventilating rooms and wearing a mask in the event of symptoms (fever, sore throat or cough), in crowded places and in the presence of vulnerable people.
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Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of January 15, 2025.


Published on January 15, 2025
Updated on January 15, 2025
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Key points

Acute respiratory infections (ARI)

• Increasing activity in the city, particularly among children, and decreasing in the hospital.

Flu

• Intensification of influenza activity in cities in mainland France. Marked severity of the epidemic, with very high hospital activity and a clear increase in deaths. Co-circulation of the three influenza viruses A(H1N1)pdm09, A(H3N2) and B/Victoria.

Bronchiolitis

• Decrease in the majority of indicators. In mainland France, 5 regions in epidemic, 7 regions in post-epidemic. In the DROMs, continuation of the epidemic in Martinique, Guyana and Mayotte. Guadeloupe in post-epidemic.

COVID-19

• Stable activity at low levels.

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PDF 3.27 MB

https://www.santepubliquefrance.fr/maladies-et-traumatismes/maladies-et-infections-respiratoires/grippe/documents/bulletin-national/infections-respiratoires-aigues-grippe-bronchiolite-covid-19-.-bulletin-du-15-janvier-2025

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From the PDF link above:
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Situation update

In week 02, activity related to acute respiratory infections in community medicine was increasing among those under 15 and stable or slightly decreasing among adults. Hospital indicators decreased in all age groups

In mainland France, the influenza epidemic intensified in S02, with different dynamics depending on the data sources and age groups. In the community, activity increased among those under 65, particularly among children, and slowed slightly among those aged 65 and over. It reached a high level of intensity in all age groups. In hospitals, a decrease in influenza/influenza-like illness indicators was observed among emergency room visits and hospitalizations in all age groups, except among those under five, where these indicators increased sharply. The share of hospitalizations for influenza/influenza-like illness among all-cause hospitalizations was still at a very high level of intensity in all age groups. The number of reports of clustered cases attributed to influenza was also rising sharply in medical-social establishments, as was the share of deaths with a mention of influenza among electronically certified deaths (7.3% in S02 vs. 6% in S01), indicating a marked severity of the epidemic. The regions in which the hospital indicators and deaths related to influenza were the highest were Auvergne-Rhône-Alpes, Bourgogne-Franche-Comté, Grand Est and Provence-Alpes-Côte d'Azur. The three viruses A(H1N1)pdm09, A(H3N2) and B/Victoria were co-circulating. An increase in the share of the A(H3N2) virus had been observed for three weeks in hospital. In Overseas, Guadeloupe and Martinique were in epidemic and Guyana became an epidemic in S02. Mayotte was in pre-epidemic.

A decrease in bronchiolitis syndromic indicators was observed in the city and in the hospital in S02 for the fourth consecutive week. The epidemic peak occurred in S50 in mainland France. For the youngest infants, the intensity remained lower than that of previous epidemics. The RSV (respiratory syncytial virus) positivity rate decreased in mainland medicine and in the hospital. In mainland France, in S02, 4 regions remained in epidemic and Corsica became an epidemic. The regions of Brittany, Bourgogne-Franche-Comté, Centre-Val de Loire, Normandy, Nouvelle-Aquitaine, Occitanie and Pays de la Loire moved to post-epidemic status and Île-de-France returned to baseline status. In the DROMs, Guadeloupe moved to post-epidemic status, Martinique, Guyana and Mayotte remained in epidemic status

The syndromic indicators of COVID-19 remained generally stable in cities and hospitals compared to the previous week and at low levels. The positivity rates for SARS-CoV-2 among city and hospital laboratories continued to decrease, but increased slightly in community medicine. The indicator for monitoring SARS-CoV-2 in wastewater also decreased. At the national level, the number of deaths from all causes transmitted by INSEE is in excess between S51 and S01 among 15-64 year-olds and 65-84 year-olds. Among those aged 85 or over, a marked excess is observed in S01. This excess mortality is probably linked to the flu epidemic.

The flu vaccination coverage as of November 30, 2024 (interim data) was 35.2% among all people targeted by vaccination, 41.0% among people aged 65 and over, and 19.0% among those aged under 65 at risk of severe flu. These vaccination coverages are lower than those estimated for the 2023-2024 season on the same date.

Vaccination remains the best way to protect yourself against flu and COVID-19, particularly against severe forms of these diseases. Vaccination is recommended for all eligible persons, particularly persons aged 65 and over and persons aged over 6 months, with comorbidities with a high risk of severe disease. The passive immunisation campaign for newborns against RSV
infections is still ongoing.

In addition to existing vaccinations and preventive treatments, the adoption of barrier gestures remains essential to protect oneself from all winter illnesses: washing hands, ventilating rooms and wearing a mask in the event of symptoms (fever, sore throat or cough), in crowded places and in the presence of vulnerable people.
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Influenza

Despite a decrease in hospital influenza indicators in all age groups except in the under-fives (in whom they increased), the level of intensity reached for these indicators in S02 was still at a very high level in all age groups. The 65 and over age group accounted for 67% of hospitalizations after emergency visits for influenza/influenza-like illness in S02. In S02, 22% of emergency visits for influenza/influenza-like illness resulted in hospitalization for all ages combined. This proportion was highest in the 65 and over age group (60%). It represented 11% in the 15-64 age group, 9% in the under-5 age group and 5% in the 5-14 age group.
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Serious cases in intensive care

Since week 40, 532 cases of influenza, 230 cases of COVID-19 and 138 cases of RSV* infections have been reported by the intensive care units participating in the surveillance (non- exhaustive surveillance). Twelve cases of influenza/SARS-CoV-2 co-infections have also been reported.
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Among the 532 cases of influenza, 46% were aged 65 or over. Among them, the presence of at least one comorbidity was reported for 87% of cases. A type A virus was identified in 93% of cases where the virus was typed (437/472). Among the 348 cases for which vaccination status was reported, 79% were not vaccinated against influenza. Forty-five deaths were reported, including 29 in those aged 65 or over (unconsolidated data).

Among the 230 cases of COVID-19, 67% were aged 65 and over. Among them, the majority were men and the presence of at least one comorbidity was reported for 89% of cases. Among the 154 cases for which vaccination status was reported, 90% had not been vaccinated against COVID-19 in the last 6 months. Forty-nine deaths were reported, including 44 in those aged 65 and over (unconsolidated data). Among the 138 cases of RSV infections, 57% were aged 65 or over. Patients with at least one comorbidity accounted for 99% of cases. Thirteen deaths were reported, including 11 in those aged 65 and over (unconsolidated data).

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Acute respiratory infections (influenza, bronchiolitis, COVID-19). Bulletin of January 22, 2025.


Published on January 22, 2025
Updated on January 22, 2025
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Key points

Acute respiratory infections

• Activity generally stable in town and decreasing in hospital.

Flu

• Continued high influenza activity in France. Indicators on the rise among under-15s.
• Marked severity of the epidemic, with hospital activity still high and still significant impact in terms of deaths.
• Co-circulation of the 3 influenza viruses A(H1N1)pdm09, A(H3N2) and B/Victoria.

Bronchiolitis

• Decrease in indicators.
• In mainland France, 1 region in epidemic, 11 regions in post-epidemic.
• In the DROMs, the epidemic continues in Mayotte. Guadeloupe, Martinique and Guyana in post-epidemic.

COVID-19

• Stable activity at low levels.

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PDF 3.41 MB

https://www.santepubliquefrance.fr/maladies-et-traumatismes/maladies-et-infections-respiratoires/grippe/documents/bulletin-national/infections-respiratoires-aigues-grippe-bronchiolite-covid-19-.-bulletin-du-22-janvier-2025