I brought all my immunizations up-to-date because I taught foreign students.
If one would like to be sick 9-10 months out of the year, just go teach or regularly volunteer in any U. S. Public School (sarcasm).
While immunizations are required of all students entering U. S. Public Schools, the trips/return visits to the native countries of origin are of major concern to me.
And they are of concern to me, as well. A nearby community employs hundreds of Mexicans in the turkey plant. Every year, after Christmas, there is an outbreak of Hepatitis A in the school system there. Hepatitis A viruses are shed in the feces of persons with the infection, and transmitted by poor handwashing and food handling practices. It is VERY common in Mexico. It is brought back to the U.S. by the immigrant kids and spreads to the rest of the school. The adults don't bring it back because most of them already had it as children and are immune.
One of the complications that may occur with Hepatitis A is liver damage. Also, the symptoms can linger on for months, especially in older children and adults. When parents complain to the school nurse and administration about this, they are told that Hepatitis A is just a mild viral illness, and no different than their kid catching a cold or the flu at school. Political Correctness again ....