Editing MMR vaccine (section)

===Administration===
The MMR vaccine is administered by a [[subcutaneous injection]], the first dose typically at twelve months of age.<ref name="CDCAdmin"/> The second dose may be given as early as one month after the first dose.<ref name=Vesikari/> The second dose is a dose to produce immunity in the small number of persons (2–5%) who fail to develop measles immunity after the first dose. In the US it is done before entry to [[kindergarten]] because that is a convenient time.<ref name=CDC-MMR-FAQ>{{cite web|url=https://www.cdc.gov/vaccines/vpd-vac/combo-vaccines/mmr/faqs-mmr-hcp.htm |title=MMR vaccine questions and answers |year=2004 |access-date=28 May 2008 |publisher=U.S. [[Centers for Disease Control and Prevention]] (CDC) |url-status=dead |archive-url=https://web.archive.org/web/20080725232358/http://www.cdc.gov/vaccines/vpd-vac/combo-vaccines/mmr/faqs-mmr-hcp.htm |archive-date=25 July 2008 }}</ref> Areas where measles is common typically recommend the first dose at nine months of age and the second dose at fifteen months of age.<ref name=WHO2017Pos/>