As the summer draws to a close, Marin County public health officials are reminding parents that five vaccinations are required before their children are permitted to attend kindergarten or childcare, barring a medical exemption. Vaccination rates for Marin kindergartners have gradually risen in recent years, reaching their highest level yet last year, with 93.2 percent of students in the county’s 73 schools meeting all requirements: DTP, which fights diphtheria, tetanus and pertussis; Hepatitis B; MMR,…