10 IMPORTED cases. <10 people a year in the usa have rubella (german measles)since 2002, all cases have been traceable to foreigners who carried the virus in from abroad. 2011, there were 222 cases of regular measles confirmed in the United States. This is a reminder to make sure that your vaccinations are up-to-date. See www. Cdc. Gov/features/measles/cached.