unvaccinated individuals can pose. there is no need to exclude students at the time as there is no evidence for school based exposure. if there should be a measles case unvaccinated children will be excluted for 21 days. -- exclude for 21 days. john fowler, ktvu channel 2 news. >> more details now, there are 12 cases in the bay area. not all of them are linked to the disneyland outbreak. officials confirmed two cases in marin. alameda has the highest number of cases in the bay area at six. >>> following developing news out of mountain view. a pedestrian was hit and killed by a cal train about 4:30 p.m. this afternoon south of the station in mountain view under the highway 237 over pass. authorities say it was an adult male. traction were shut in both directions but the north bound tracks are now back open. there are delays. a bus bridge is also in operation. authorities at this point say it appears the person who died may have committed suicide. >>> police are looking for a sexual predator who assaulted a 10-year-old boy this week. police say the boy was walking ob98th avenue when a man lure -- on 98th avenue when a man dured him and aal -- lured him and assaulted him. he is describered a