1. These authors contributed equally to this article and share first authorship
2. National Center for Measles/Mumps/Rubella, Central Virology Laboratory, Ministry of Health, Sheba Medical Center, Tel Hashomer, Israel
3. Infectious Diseases Research Unit, Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
4. Jerusalem District Health Office, Ministry of Health, Jerusalem, Israel
5. Division of Epidemiology, Ministry of Health, Jerusalem, Israel
6. Southern District Health Office, Ministry of Health, Beersheba, Israel