leanne melendez, abc 7 news. ama: los angeles is the first major school district to require all eligible students to be vaccinated. the mandate that applies to students 12 and older. students must be vaccinated by january 10 unless they have a medical or approved exemption. dan: there is a memorial to a crossing guard who was hit and killed in front of a school. witnesses say he saved the life of at least one child. laura anthony has the story. >> he was a wonderful man. laura: gretchen was one of many who stopped by a growing memorial. signs and flowers paying tribute to ashley dias, the 45-year-old crossing guard killed wednesday afternoon. >> this is tragic. this street is horrific for dropping kids off. he is a hero. >> it is unbelievable. laura: dias' parents say their son was a kind man who returned to his job as a crossing guard a couple days ago. >> we spoke to him this morning. we spoke to him before he went at 2:00 for the crossing. >> the crossing guard saved the kid. laura: witnesses say dias pushed a

senior education reporter leanne melendez is live with more. leanne: yeah, well, clearly the teachers union is leading this rally with the support of parents and school board members as well. they are asking, requesting three things. one, more testing for children. air purifiers in every classroom. and instead of having kids wear this surgical mask, give them something that is a little bit more, they say, safer. that would protect them against both covid and smoke. it's somewhat of a catch-22 situation. >> we have air quality issues. some of our teachers have ash coming and when we have the bad air quality. leanne: closing windows reduces the ventilation needed to protect against covid. as of last week, only 775 775 classrooms in san francisco public schools had air purifiers. during a recent town hall on abc 7, the district's chief facilities officer said help was on the way. >> parents can expect to see more news from the district over the next few weeks as we both iron out funding and timing and deployment. leanne: the funding was approved by

in oakland, leanne melendez, abc 7 news. >> teachers and students are breathing easier inside san francisco schools. the process to meet state covid safety requirements. >> in the summer, we ensured every classroom space had either functional mechanical operation, affordable windows -- operable windows. now we are doing our second round of installations to help against wildfires. corrects the age of some of the buildings in the district will require upgraded electrical systems in order to meet the energy demands. the price tag for the new air cleaners was nearly $3 million. >> dr. anthony fauci says if vaccines were approved for children, parents should not hesitate, saying potential risks like heart inflammation are rare. >> pediatric hospitals are being stressed with children who got ill enough to get hospitalized. we can't take that lightly. that is the reason why we feel strongly about getting vaccinated. >>'s comments came during a virtual town hall, hosted by the chief medical correspondent. as for getting your covid-19 antibody levels tested, dr. fauci is skeptical. saying it could m

leanne melendez, abc 7 news. dan: more to come here.s on the bay area landscape. ama: we delve into census numbers and uncovered changes in the dan: we are highlighting the importance of the community in the bay area. it's the largest racial or ethnic group in california with growing numbers in the bay area. julian glover breaks down the numbers. reporter: remember those census surveys you feel that last year? the results are in. more than one in three californians identify as has been a or latino. 39.4% of the population. in the bay area, seven out of nine counties saw an increase in the hispanic latino population. solano saw the l l more than 4%. vallejo had one of the largest increases, adding 7000 more hispanic or latino people in 10 years. san francisco and alameda county's saw small increases in the population. keep in mind that they have larger total populations than the north bay counties. richmond and antioch saw significant increases in the number of residents identifying as hispanic or latino. theeeeeeeee saw a decrease in th

leanne melendez, abc 7 news.as once the youngest self-made billionaire and now she is accused of fraud. what we can expect in the trial of elizabeth holmes. you are staring at the exploratory him. no it looks cool now. it feels cool that it will warm up. we will have your majestic mountains... scenic coastal highways... fertile farmlands... there's lots to love about california. so put off those chores and use less energy from 4 to 9 pm when less clean energy is available. because that's power down time. amanda: ambition and fame gone terribly wrong. that is what prosecutors will depict of elizabeth holmes. she is accused of lying to investors nearly 20 years ago about her company. a federal prosecutor joins us with his take on what we could take -- see play out. good morning. gil: good morning. amanda: what are the defenses we may see? gil: leading defense is that she did not intend to fraud anybody. the government has to prove she did. we will sear to arguments in support of that. first was that she was surroun

there are viral videos like this one that was shot by our reporter leanne melendez.his was inside a walgreens in san francisco. any of these videos show thieves grabbing merchandise inside stores and then just running away. and a renewed crackdown, the police department will be expanding its retail crime unit from two to six full ambassadors. they will put retired police officers in commercial corridors to determine crime. -- to deter crime. >> there has to be consequences because we can't continue to allow what we see as lawlessness continue to dominate our city. kumasi: also, when you report tell theft online, there will not be a section to include a suspect description. the police chief says the information will be key to helping and best gators. reggie: amazon is reportedly going high-tech in its planned open to permit stores. wall street journals as possible plans include you using your close -- your phone to pick out close to try on, then workers going to get them. the source could open it soon as next year. kumasi: happening today, fedex is holding a national

leanne melendez, abc 7 news.ng statements are sefor wednesday in the trial of elizabeth holmes. jurors were sworn in after two days of questioning. the panel will be seven men and five women. she knowingly misled doctors, pahe compa'sootetechnosay. lknalyst:00,e on challenges she may base during her trial. still ahead, supply and demand squeeze. why you might want to start holiday shopping earlier than usual. we want to take a live look from our group camera looking at the exploratory of. it is going to be a warm weekend. lisa argen will have your forecast in a few minutes. it's another day. and anything could happen. it could be the day you welcome 1,200 guests and all their devices. or it could be the day there's a cyberthreat. get ready for it all with an advanced network and managed services from comcast business. and get cybersecurity solutions that let you see everything on your network. plus an expert team looking ahead 24/7 to help prevent threats. every day in business is a big day. we'll keep you ready