AP Photo/Rich Pedroncelli
Students who have not been vaccinated against whooping cough or who lacked proof of their vaccination are seen in the gym at Inderkum High School in Sacramento. Calif., , Monday, Sept, 19, 2011. A law passed last year by the state Legislature requires all middle and high school students to receive the vaccination by the start of the 2011- 2012 school year. A 30-day extension had been granted, but many school districts began hitting that deadline last week. Inderkum High principal George Tapanes had students without the vaccination or proof of it sent to the gym. Nurses were giving vaccinations in an adjoining gym.