Hundreds more were given reprieves.
New regulations require all students to receive second doses of vaccines for mumps and chicken pox. Seventh-graders also must get inoculations against meningitis, tetanus, diphtheria and pertussis.
For most districts, the deadline to comply was this week.
The Times-Tribune reports (http://bit.ly/JI1cQC) that 155 students in the Scranton school district were kept out of class on Tuesday.
The Citizens' Voice reports ( http://bit.ly/JI4jYS) the Wilkes-Barre and Wyoming Valley West districts each have more than 200 students who are not up-to-date on their shots.
Officials say those students are still attending school but will be excluded next year without immunizations.