Key Points

Bronchiolitis in Mayotte: Start of the 2021–2022 Epidemic

• The epidemic started about a month earlier than in previous seasons

• Recent end of the previous epidemic (October) with higher viral circulation than in previous years during the inter-epidemic phase

• Increase in all indicators in S50:

  • 16 emergency department visits recorded in S50

  • 42% of hospitalizations following a visit

  • Increased activity among physicians in the Mayotte sentinel network

  • A doubling in one week of RSV (Respiratory Syncytial Virus) cases detected through virological surveillance