The CDC recently sent out a recommendation to travelers to get the MMR shot. Outbreaks in Switzerland and Israel have resulted in measles outbreaks in the US. If you are traveling to a developing country, measles outbreaks are not uncommon so an updated MMR is recommended. See the CDC recommendations for the MMR, including those for children as young as 6 months. Measles can be a very serious disease. 1 out of every 4 people who get measles in the US are hospitalized.