An unvaccinated teacher was responsible for an outbreak in Marin in May that infected 26 others, according to a report released last week by the Centers for Disease Control and Prevention. The teacher, one of two unvaccinated staffers at a school identified in news reports as Our Lady of Loretto School in Novato, worked for two days after becoming symptomatic. During that time, the teacher read aloud to the classroom while unmasked, spreading the virus…