We cannot stress enough the importance of being properly vaccinated! As international travelers we have both the capacity and responsibility to not only protect ourselves but also others from unnecessary exposure to diseases.
Since around November of 2018 reported cases of measles has increased, even more dramatically at the start of this year and is now considered an outbreak. The outbreak has been contained mostly to the south of Thailand with low risk in the Northeast where Mundo Exchange operates.
You can double check what the CDC recommends in terms of vaccinations and safety precautions before traveling to Thailand here.