Key points

COVID-19

Continued strong increase in SARS-CoV-2 viral circulation across the entire region, with a confirmed rise in hospital admissions, particularly among the elderly.

• The BA.5 sublineage has been stable and dominant since week S24; it accounts for 58.4% of interpretable sequences in the Flash S25 survey (58.8% for Flash S24); increase in the proportion of samples carrying the L452 mutation (57.9% in S26 vs. 54.4% in S25).

• Increase in the number of COVID-19 cases in ESMS

Other regional surveillance

• Gastroenteritis and acute diarrhea: activity was low, with a decline in hospital emergency departments.

• Chickenpox: activity declining in hospital emergency departments

• Allergies: activity stable in hospital emergency departments

• Asthma: activity on the rise in hospital emergency departments

• Air quality: moderate to poor for this weekend

• Heat-related illnesses: activity is decreasing in hospital emergency departments.