next at 5:00, the questions concerning a booster shot for covid-19, new developments tonight reveal whether we really need one. plus intsow aiin santa clara county. we may be seeing a turning point in which supply finally meets demand. and the next vaccine. why local researchers say going old school may be better than cutting edge. up next, the derek chauvin case is now in the hands of the jury. and the idyllic spot that is causing heart ache. it's what you can't see that's leading to some big changes.

there have been a lot of questions about the need for a covid booster shot. and there's now data on whether we actually need one. >> i'm l eanne >> >> and i'm dion lim. >> so far the data suggests otherwise. pfizer and moderna's vaccine have proven to be effective for at least 9 months. but researchers are just weeks away from exceeding that benchmark. left with the question do i need a booster shot? >> we may not need booster

shots. >> reporter: ucsf infectious disease dr. monica gandhi says there's a reason why we should know the answer is no. >> those who receiveed the shots received it in summer of july 2020. we have not seen breakthrough infections everyone in the setting of surges and persisting cases in the united states. >> reporter: according to pfizer data that came out this month of the 44,000 people who received the vaccine, there was 100% efficacy protecting against severe disease at six months. >> even including people in south africa who were exposed to the b 1 variant. >> reporter: now those trial participants are reaching 10 months still no reports of severe reinfection. >> what we'll have to do in the future is do surveillance for people who are symptomatic and see if there's a variant that breaks through the vaccine. >> reporter: if that happens, a booster shot may be required. >> a lot of work ahead.

>> reporter: ucsf desi cotis is already preparing for the logistics of how the booster shot would be are prioritized if needed. >> the highest risk medical care workers have been recorded. >> reporter: as far as distribution. >> i would think that a lot of the pharmacies will be a conduit for people to get their boosters. >> reporter: until then, dr. gandhi says it's not looking likely boosters will be in our future. as all three vaccines will from producing a t cell immunity which is effectively fighting variants. >> another point, dr. gandhi made is everyone if these booster shots are available by the fall it's potential they won't even be recommended or widely available at that time. ultimately of course public health officials will be making that call not the ceos of pfizer or moderna. stephanie sierra, abc 7 news. and steph speaking of. if we reach the point in which

a booster shot is needed, will the side effects be better or worse. any idea on that or how much additional protection would it provide us. >> interesting questions, dr. gandhi did say if we need booster side effects won't be a severe since our anti bodies to the vaccine whether have calmed down so that's good news. as far as the amount of additional protection provided. she explains since the current vaccines already have high levels of t cells which produce long lasting immunity the booster may only increase protection by roughly 5 to 10%. >> all right, so much helpful information there we appreciate your efforts as always. stephanie, thanks. now to supply and demand for the vaccine. just last week levi's stadium set a record for the highest amount of covid-19 doses administered in a single day. but can it keep up? abc 7 news rechs uyenhas couraging ne t h y.po l

this afternoon, 16-year-old jaselin voss didn't waste any time in getting the covid-19 vaccine as soon as she would be able to book it. >> i play soccer and my family plays soccer so we would like to be able to go back to the fields and be normal again and just have a good time. >> reporter: in santa clara county more than half of people 16 and up have received a first dose. nearly a third have been completely vaccinated. an encouraging milestone as county officials continue to ramp up supply from the federal government. >> the challenge of getting an appointment has hopefully passed. >> reporter: new appointments are added on a daily basis and first doses can now be scheduled up to one week in advance. overnight 10,000 additional slots may be made available. the county is working to increase evening availability. >> we feel very confident that our inventory will continue to be such that we have no problems meeting the second dose requirements for those who have gotten their first dose and that we'll be able to

continue offering first doses in the first edition. >> reporter: to help maintain equitable doses. people are going door to door to register families for appointments. these efforts are especially crucial as some may be hesitant to get vaccinated due to the recent issues surrounding the johnson & johnson vaccine. >> there's a fourth wave hitting many parts. we don't want that to happen here. we want to hang on to the progress we've already made. >> reporter: a push to administer as many vaccines as possible. >> i would see it as a risk because you're hearing stories. once you're done you feel a relief. and you know you've done the right thing. >> reporter: in the south bay, chris nguyen, abc 7 news. researchers at stanford are working on a new covid vaccine they hope could some day help fight the pandemic in the

developing world. they're drawing on technology. >> reporter: the war against covid-19 has unleashed a new generation of cutting edge vaccines. some using generic code to turn our own cells into tiny vaccine factories. but in the years to come, some researchers believe an old school approach may help. to get more vaccine supplies to countries that need them. >> many countries are yet to receive a single dose and that reflects the inequity. >> reporter: to help bridge the gap, professor palentra and colleagues of the university of washington have begun experimenting in what's known a sub unit vaccine. the platform deploys an antigen from a dead sample of the virus to trigger an immune response. he says it's known around the

world. >> they represent one of the main kinds of vaccines including the hepatitis vaccine and tetanus and so on. >> reporter: but to make their candidate more effective against covid-19 the team is adding helpers known as adjuventa. along with collaborators they tested five in a nonhuman primate study including one that seemed to help with the south south african strain of covid. they could easily distribute it globally since it doesn't require a deep cold freezer or other special handles. >> that's where i think vaccines such as these have really an important contribution to make. >> reporter: at stanford, luz pena, abc 7 news. the murder trial of derek chauvin is now in the hands of a jury. closing argumenting today leaned heavily on video of the former minneapolis police and

george floyd. as laura anthony explains, oakland is among the cities that are on edge awaiting the verdict after recent protests. >> it's not the first time with this window and this is a pretty large window. so it was pretty traumatizing. >> reporter: taylor jay has seen this before. the front window of her business shattered in the wake of an otherwise peaceful protest in downtown oakland: it happened friday night as shown in these pictures she provided us. one of many businesses vandalized up and down broadway. for jay it was the first time she had reopened her store in a year. >> we're just here trying to operate our businesses in the midst of a pandemic and so you know, it's very unfortunate. >> this is completely unacceptable. >> reporter: mayor schaff says that they're trying to identify the vandalizers on video. >> when groups march after

dark, there are people that have planted themselves inside crowds intent on doing destruction and violence. >> reporter: the new vandalism comes as oakland and other cities await a verdict in the trial of derek chauvin in minneapolis. >> i'm going to be calming a meeting of the oakland city council together with our mayor, our city attorney, our city administrator or police chief so that we can, be informed and make a plan to ensure that oaklanders can be safe. >> reporter: even as they struggle to pay for the repairs many business owners are sympathetic for the cause and are worried the aábgs of a few may detract from a larger message. >> we're fighting for justice right, we're in support of that. i think this is just a plot against that. once there is a verdict we will send a push alert through

our news app. mayor schaff got emotional when she talked about a suspicious fire that killed a father and his daughter. the father helped his pregnant wife get out and his toddler died in his arms when he went back in the home to pull her out. and mayor schaff call it is arson an evil act. >> it's something that should leave each and every one of us speechless and heartbroken. this is not who we are as a city or a community or a society. police say a man connected to the shooting turned himself in on thursday. a $40,000 reward is offered. alameda police are investigating a death near the south shore center shopping area. sky 7 shows police blocking off

an area near the lagoon this afternoon. police have not released any information other than to avoid the area. a long walk off a short dock. how a man is havi some days, you just don't have it. not my uncle, though. he's taking trulicity for his type 2 diabetes and now, he's really on his game. once-weekly trulicity lowers your a1c by helping your body release the insulin it's already making.

most people reached an a1c under 7%. plus, trulicity can lower your risk of cardiovascular events. it can also help you lose up to 10 pounds. trulicity is for type 2 diabetes. it isn't for people with type 1 diabetes. it's not approved for use in children. don't take trulicity if you're allergic to it, you or your family have medullary thyroid cancer, or have multiple endocrine neoplasia syndrome type 2. stop trulicity and call your doctor right away if you have an allergic reaction, a lump or swelling in your neck, severe stomach pain, changes in vision, or diabetic retinopathy. serious side effects may include pancreatitis. taking trulicity with sulfonylurea or insulin raises low blood sugar risk. side effects include nausea, vomiting, and diarrhea, which can lead to dehydration, and may worsen kidney problems. show your world what's truly inside. ask your doctor about once-weekly trulicity. i'm greg, i'm 68 years old. i do motivational speaking in addition to the substitute teaching. i honestly feel that that's my calling-- to give back to younger people. i think most adults will start realizing that they don't recall things as quickly as they used to

or they don't remember things as vividly as they once did. i've been taking prevagen for about three years now. people say to me periodically, "man, you've got a memory like an elephant." it's really, really helped me tremendously. prevagen. healthier brain. better life. from sonoma county tonight more evidence of the drought we're already experiencing. to see it abc 7 news reporter wade freemans journeyed to north sonoma at the top of the valley. >> reporter: it is a special time of year in sonoma county, grapes on the way and promises, promises. but if you want to grand illusion stay away from this valley, where a sign

points at the reality. >> we always point toward reality. the edge of the launch is where the normal water is. >> reporter: it's not the case this year, it's become the ramp to nowhere. >> this is no man's land. >> have you ever seen this before? >> never. >> ever? >> ever. not at this time of the year. >> reporter: how long, so low the water should be near the top of this concrete pilings. so low that the exposed lake bed looks like a moon scape. where i'm standing is where it should be at the end of a bad season. >> it is the driest year that we've seen everyone drier than 1977. >> reporter: that's pam gina the sonoma water agency. lake sonoma provides much of the water for 600,000 people in this country. expect mandatory cut backs everyone now. some people don't see the drought that has already arrived. >> last year, was a very low rainfall year also. but with covid, understandably people were not paying

attention. >> reporter: but one look at lake sonoma and maybe they will. either that or have a chat with rick herbert he's not encouraging. >> it will probably go down another 30 feet by the time it starts raining. >> reporter: at lake sonoma in sonoma county, wade freedman. californians may be tired of being cooped up but that doesn't mean they're ready to jump into their cars when the pandemic ends. 31% of telecommuters would rather continue working at home given the choice. 22% said 3 to 4 days a week would be cool. just 18% said they would want to head back to the time. abc

attention, california. new federal funding of $3 billion is available to help more people pay for health insurance — no matter what your income. how much is yours? julie and bob are paying $700 less, every month. dee got comprehensive coverage for only $1 a month. and the navarros are paying less than $100 a month. check coveredca.com to see your new, lower price. the sooner you sign up the more you save. only at covered california. this way to health insurance. an earthquake today in lake county was tpeltd as far south

as san francisco. the 4.0 magnitude quake hit the anderson springs area at around noontime. people as far away as vallejo and san francisco some 95 miles away reported feeling the quake. there are no reports of serious damage or injuries. all right, well if you didn't feel the quake you probably felt a breeze around the bay area today, today, toda >> definitely. i feel a cooldown coming, but i love your sleeveless look like it's still warm outside. >> it is still warm. we have a sea breeze that's helped topple those temperatures in much of the bay area. you were in the 90s yesterday. same thing with fairfield 12 degrees cooler right now compared to 24 hours ago and san jose is also down 4 degrees. the stronger sea brees, 39 miles per hour in san francisco right now. with that breeze really we're

getting the side benefits of good air quality for the bay area to moderate air quality because the sea breeze will continue the next few days. so we'll call it good for most of you. coast and central bay. moderate in case you want to get out and about. from the mount cam. you're seeing higher clouds moving in in addition to patches of fog out there which will be increasing through the night. 56 in san francisco, to 61 in oakland. 67 in san jose. our warmest spots today in the low 80s along the coastline we were in the mid-50s our exploritorium county certainly get used to this cooler weather. napa you're at 69. and livermore 67-degree. we'll have to wait until the overnight hours before we'll see more of that

emoryville camera, cooler weather. and rain returns. i am so excited to tell you about it. but first immediate forecast. spotty drizzle across parts of the bay area. don't be surprise first-degree you do run into some slippery roadways. speaking of watch out for that especially near the coast and bay. temperatures will be in the 40s, 50s, combination of low and high clouds as we head into the afternoon, 55 in half-moon bay. 59 in san francisco. around the east bay shoreline mid-60s freemont, oakland. 74 in santa rosa. 66 san jose. 74 degrees in concord. so the inland areas will continue to see the drop off in the temperatures and i want to show you what's going to happen beginning this weekend. so saturday a system starts to approach. there's a chance the far northern end of our viewing area could pick up a couple of showers late at night but it's really sunday when we start to see the system sliding

southward. bringing us the much needed rain here in the y area. a few showers continuing on monday morning before this system heads out. now it's been well over a month i mean the last measurable rain we had was march 18th. so we definitely need this. the accu weather forecast cooling continues tomorrow. staying cool on the coast wednesday but mild in inland. not much change for the end of the workweek but the weekend brings back a level one storm. yes so sunday and monday we have wet weather coming back to the bay area. get ready to, swap out out shades for the umbrellas. >> anna, dion. >> i always love your enthusiasm when there's impending rain, sandhya. >> thank you. >> we'll check back in with you. thanks. imagine if the oscar ceremony was like a movie not

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the figures. >> more than 55% of doses received has been distributed. >> the answers to your vaccine questions. >> every county is different. >> if we stay at that pace how long do you think it will take to vaccinate a majority of the

population. >> from our dedicated team of experts. >> the trials locally and beyond the world are still very much ongoing. >> vaccine watch, every day on abc 7 news. and a reminder that you can get our live newscast, breaking news, weather and more with our new abc 7 bay area app on apple tv, android tv, fire tv and roku. just search abc 7 bay area and download it. finally tonight there are just six days to oscars hard to believe. >> this is our chance to do something completely different. >> jesse collins and aloneven s producers of the 93rd oscars understands how different this show is going to be. >> it's going to be a very emotional experience to be able to gather safely again. >> reporter: that gathering taking place at a new oscars location, in downtown l.a. >> exile, we're down. >> this is the space that's

been used for the dark knight rises, for blade runner. why was union station the right place to do this year's oscars. >> we all joked that we were familiar with it because of movies. >> reporter: oscars state of the science covid protection to protect attendees have their roots in a sequence film two of the producers worked on. >> it's a billion, that's where we're headed. >> reporter: you made contagion a decade ago. what are the lessons you learned that you're bringing to the oscars. >> three of the leading epidemiologists are working with us so we can make sure that we can keep everyone who's participating safe. >> how long are we going to see participants wearing mask. >> they're going to play a role in the show. >> reporter: you will feel you're watching a movie.

promises the ever inventive sotoburg who won an oscar for directing traffic. >> if you're not here at union station how and where will you be accepting your award. >> satellite hook ups, laptops, on your coach. every nominee is the michael jordan of their category. they deserve to give their speech. >> what are you going to do if it doesn't go downright? >> cry. >> no. >> we think the acceptance speeches are the things people remember. >> it's going to be unexpected stuff and that's the best part of live tv. >> you just never know what's going to happen. >> now you can watch the oscars live right here on abc 7 at 5:00 p.m. this sunday april 25th. world news tonight with david muir is next. >> i'm dion lim. >> and i'm anna

sandhya patel and everyone here, have a great evening. we hope to see you at 6:00. at chewy, we know it's important for your pet to feel good inside and out.

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tonight, breaking news as we come on the air. it is now in the hands of the jury. deliberations now under way in the trial of former minneapolis police officer derek chauvin. the prosecution and defense and their closing arguments today. the prosecutors telling jurors, "you can believe your eyes." and what the defense asked the jury to think about in addition to those 9 minutes, 29 seconds, seen by the nation and the world. alex perez tonight from minneapolis. the other news this monday night, more than half of all adults now receiving at least one dose of vaccine. and tonight, what the cdc is now saying about the temporary pause of the johnson & johnson vaccine. the cdc director saying they are looking into a very small number

of cases that could be related, thgh