1. These authors contributed equally to this work and share first authorship.
2. Infectious Diseases Service, Lausanne University Hospital, Lausanne, Switzerland
3. Cantonal Doctor Office, Public Health Department, Canton of Vaud, Lausanne, Switzerland
4. Laboratory of Virology, Laboratory Medicine Division, Geneva University Hospitals, Geneva, Switzerland
5. National Measles and Rubella Reference Laboratory, Geneva University Hospitals, Geneva, Switzerland
6. Geneva Center for Emerging Viral Diseases, Geneva University Hospitals, Geneva, Switzerland
7. Unit of paediatric infectious diseases and vaccinology, Service of Paediatrics, Women-Mother-Child Department, Lausanne University Hospital, Lausanne, Switzerland
8. Communicable Disease Division, Federal Office of Public Health, Bern, Switzerland