1. Both authors contributed equally to this work and share first authorship
2. European Public Health Microbiology Training Programme (EUPHEM), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
3. Virologie et Pathologie Humaine (VirPath), EMR 4610, Université Lyon 1 - Université de Lyon, Hospices Civils de Lyon, Lyon, France
4. Laboratory of Virology, Centre de Biologie et Pathologie Est, Hospices Civils de Lyon, Lyon, France