>>> EARLIER TODAY MEDICAL EXPERTS ANNOUNCED A PLAN FOR BOOSTER SHOTS FOR EVERY FULLY VACCINATED AMERICAN.

THIS WILL BOOST YOUR IMMUNE RESPONSE AND INCREASE YOUR PROTECTION FROM COVID-19.

AND IS THE BEST WAY TO PROTECT OURSELVES FROM NEW VARIANTS THAT COULD ARISE.

>> PRESIDENT JOE BIDEN MAKING NEWS ABOUT THE FIGHT AGAINST COVID-19.

BOOSTER SHOTS ARE ON THE WAY.

AND NURSING HOME WORKERS WILL BE REQUIRED TO BE VACCINATED.

THE DEPARTMENT OF EDUCATION IS TAKING ACTION AGAINST GOVERNORS WHO ARE MAKING ROADBLOCKS FOR SCHOOLS.

THANK YOU FOR JOINING US I AM MAYA TRABULSI.

PRESIDENT JOE BIDEN MADE THOSE COMMENTS AT THE WHITE HOUSE.

THE BIG HEADLINE IS THAT BOOSTER SHOTS WILL BE AVAILABLE IN THE FALL.

HERE THE LATEST NUMBERS IN SAN DIEGO.

THE LATEST DATA REPORT SHOWS 1700 NEW INFECTIONS.

THE HIGHEST ONE DAY TOTAL SINCE JANUARY.

THERE ARE ZERO NEW DEATHS IN THE SAN DIEGO.

AND THAT IS AN INDICATION THAT VACCINES ALLOW FOR A BETTER RECOVERY.

PRESIDENT JOE BIDEN IS ENCOURAGING VACCINATED AMERICANS TO GET THEIR BOOSTER WHEN THE TIME COMES.

HERE THE BENEFITS OF A NEW ROUND OF VACCINES.

A RECENT STUDY FROM ISRAEL SUGGESTS THAT VACCINE PROTECTION COULD DECREASE AFTER SIX MONTHS.

A PROFESSOR AT THE LA JOLLA INSTITUTE OF IMMUNOLOGY SAID THAT THE DELTA VARIANT MEANS THAT BOOSTERS ARE NECESSARY.

>> AT DELTA IS ALMOST LIKE A DIFFERENT VIRUS.

IT IS DRAMATICALLY MORE TRANSMISSIBLE.

THE MORE TRANSMISSIBLE THE HARDER IT IS FOR YOUR IMMUNE SYSTEM TO STOP.

>> THE BOOSTERS CONTAIN THE SAME MEDICINE.

THE BOOSTER WOULD ONLY EXTEND A PERSON'S IMMUNITY.

>> IT WOULD NOT BE UNREASONABLE FOR IT TO BE GOOD FOR 10 YEARS.

JUST LIKE A TETANUS OR HEPATITIS B VACCINE.

>> I WANT TO GET IT HAVE THAT ADDED PROTECTION.

SAMAK A KIDNEY TRANSPLANT RECIPIENT IS EXPECTED TO GET THE VACCINE.

>> MY DOCTOR SAID I SHOULD JUST GO FOR IT.

I JUST NEED TO GO TO CPS.

I DON'T NEED A PRESCRIPTION.

JUST TO LET THEM KNOW I AM IMMUNOCOMPROMISED.

SCENE THOSE THAT CAN GET THE BOOSTERS AT CBSN WALGREENS.

THERE IS NOT A BOOSTER RECOMMENDATION FOR PEOPLE WHO RECEIVE THE JOHNSON&JOHNSON VEXING.

>>> MEXICO HAS ISSUED EMERGENCY USE AUTHORIZATION FOR A COVID VACCINE TO BE USED IN THAT MEXICO.

THE UNDERSECRETARY OF HEALTH SAID 79 MILLION COVID VACCINE DOSES HAVE BEEN ADMINISTERED SO FAR.

>>> IT WAS BACK TO SCHOOL FOR MANY LOCAL DISTRICTS THIS MORNING.

THE THIRD LARGEST SCHOOL DISTRICT IN THE COUNTY AT A 36,000 SKIDS JOINED WITH TEACHERS AND STAFF.

CAMPUSES HELD SPECIAL WELCOME BACK EVENTS AS MANY STUDENTS RETURN FOR THE FIRST TIME AFTER STAYING HOME DUE TO THE PANDEMIC.

THE SUPERINTENDENT SAYS THAT A LOT OF WORK WENT INTO MAKING CAMPUSES SAFE AND THAT THE STATE MASK MANDATE IS IN EFFECT.

>> >>> A BIG DAY ON THE CAMPUS OF SAN DIEGO STATE UNIVERSITY.

THOUSANDS OF STUDENTS ARE MOVING INTO THE RESIDENCE HALLS.

FOR SOME IT IS A LONG TIME COMING.

WE TALKED TO A STUDENT WHOSE ENTIRE COLLEGE EXPERIENCE HAS BEEN DEFINED BY THE PANDEMIC.

>> I AM FROM HAWAII AND I HAD TO GO HOME AND DO SCHOOL ONLINE AND I'M JUST EXCITED TO GET BACK INTO THE GROOVE AND GO TO SCHOOL IN PERSON AND MEET NEW PEOPLE.

AND REALLY EXPERIENCE COLLEGE LIFE.

>> THE UNIVERSITIES REQUIRING VACCINATIONS FOR ALL STUDENTS AND THE STAFF.

THE FALL SEMESTER BEGINS ON MONDAY >>> THE CDC REPORTS 120,000 KIDS TESTED POSITIVE FOR COVID- 19 LAST WEEK.

THAT IS 14 TIMES WHAT WE SAW IN JUNE.

AND YET SCHOOL DISTRICTS ACROSS THE COUNTRY ARE FACING THREATS FROM THEIR OWN GOVERNORS.

HERE'S THAT MORE ON THE DISCONNECT >> Reporter: IT IS THE FIRST DAY SCHOOL IN BROWARD COUNTY, FLORIDA AND STUDENTS ARE REQUIRED TO WEAR A MASK.

'S DECISION TO DEFY THE GOVERNOR'S ORDER AND FACE PUNISHMENT FROM THE DEPARTMENT OF EDUCATION.

A MOVE THAT SCHOOL OFFICIALS SAY IS WORTH THE RISK.

>> WERE VERY CONCERNED ABOUT THE NUMBER OF CASES THAT ARE HAPPENING IN BROWARD COUNTY.

WE ONLY HAVE FIVE ICU PEDIATRIC BEDS AVAILABLE.

>> Reporter: ALMOST 4000 STUDENTS TESTED POSITIVE.

AND 14,000 ARM QUARANTINE DUE TO THE VIRUS.

>> WE ARE IN A TERRIBLE SITUATION WE DO NOT HAVE THE APPROPRIATE RESPONSE.

>> Reporter: THE BATTLE IS NOT JUST IN FLORIDA.

THE ARIZONA GOVERNOR IS THREATENING TO WITHHOLD FUNDING AND IT'S THE SAME IN TEXAS WHERE THE SCHOOL MANDATE IS BEING FOUGHT IN COURT.

AND WHERE GOVERNOR GREG ABBOTT TESTED POSITIVE.

>> I HAVE RECEIVED THE COVID-19 VACCINE.

>> MAYBE THAT'S WHY I DON'T FEEL ANY SYMPTOMS.

>> Reporter: THERE ARE ONLY 300 ICU BEDS AVAILABLE IN TEXAS.

>> AND IN ALABAMA THERE ARE NO ICU BEDS AVAILABLE IN THE ENTIRE STATE.

NEW CORONAVIRUS INFECTIONS ARE ON THE RISE IN 37 STATES.

WITH THE SEARCH MASKS WILL BE NECESSARY.

WITH 10,000 PEOPLE STARTING TOMORROW IN LOS ANGELES COUNTY.

THE TSA IS EXTENDING THE FEDERAL MANDATE THROUGH JANUARY.

SPOKE FOR MASKS THAT IS A NO- BRAINER.

WE ARE PUSHING UP TO 150,000 NEW CASES DAILY.

>>> S.T.E.M.

EDUCATION IS A BIG PART OF THE COVID STORY.

COMING UP WE WILL SHOW YOU THE WORK THAT IS HAPPENING AT YOU SEE SAN DIEGO THAT COULD HELP THE CAMPUS CONTAIN THE VIRUS OF STUDENTS RETURN.

>>> FRIENDSHIP PARK CELEBRATING 50 YEARS OF FRIENDSHIP BETWEEN THE PEOPLE OF MEXICO AND THE UNITED STATES.

HERE'S MORE ON THE PARKS ANNIVERSARY TRIP THE COUNTY BOARD OF SUPERVISORS DECLARED INTERNATIONAL FRIENDSHIP PARK DAY.

50 YEARS AGO TODAY THE FIRST LADY, PAT NIXON VISITED THE BORDER WHERE SAN DIEGO MEETS TIJUANA, MEXICO >> ON ON THAT OCCASION SHE ASKED THE SECURITY DETAIL TO REMOVE THE BARBED WIRE AND SHE WALKED INTO MEXICO TO GREET THE CROWD ON THE OTHER SIDE.

>> Reporter: THE PARK HAS LONG SERVED AS A MEETING PLACE TO HUG LOVED ONE THROUGH THE BORDER FENCE.

IN RECENT YEARS BORDER PATROL RESTRICTIONS HAVE INCREASED.

>> IT'S NOT AN INVITING SIDE ON THE UNITED STATES LOCATION.

>> Reporter: LOCAL ADVOCATES HOPE TO RESTORE FRIENDSHIP PARK BACK TO ITS TRUE PURPOSE.

WITH THE VISION OF CREATING AN OPEN 80 ACRE NATIONAL PARK.

JIM BROWN WITH PUBLIC ARCHITECTURE SAID A SIMILAR PARK ALREADY EXISTS ON THE CANADIAN BORDER.

>> IT IS TIME TO SEND A MESSAGE TO CITIZENS AND TO GOVERNMENT AND THIS WOULD BE A WONDERFUL THING TO HAVE INSTEAD OF THE DESTRUCTIVE MILITARIZED SITUATION OF THE BORDER CURRENTLY.

>>> MORE FIRE IS BURNING NEAR THE SMALL TOWN OF GRIZZLY FLATS.

IT IS DRY AND WINDY AND THAT IS MAKING IT HARD TO MAKE PROGRESS ON THE FIRE.

A LOCAL REPORTER TALK TO ONE WHO WANTS TO DO HER PART TO HELP HER NEIGHBORS.

>> I WANTED TO GIVE PET FOOD TO PEOPLE WHO HAD TO LEAVE IN A HURRY.

I GOT THAT IN CAT LITTER.

>> WHY WERE YOU MOTIVATED TO DO THAT.

>> YOU NEVER KNOW WHEN IT'S GOING TO BE YOUR TURN.

I JUST WANT TO HELP AND PAY IT FORWARD .

IT'S VERY SAD WHAT IS HAPPENING SPOKE THIS SATELLITE PHOTO OF THE CAL DOOR FIRE FROM SPACE.

>>> LEAVING AFGHANISTAN AND HOW IT AFFECTS THE LARGE MILITARY POPULATION WILL COME IN TO CONTEXT DURING TOMORROW NIGHT'S RECALL DEBATE.

HEARS THIS UPDATE FROM WASHINGTON.

>> Reporter: THE DEPARTMENT OF DEFENSE SAID THAT U.S. MILITARY AIRCRAFT CONTINUE TO MOVE THOUSANDS OF AMERICANS OUT OF AFGHANISTAN.

>> I KNOW THE COUNTRY, AND THE PEOPLE IN THOSE WHO FOUGHT ALONGSIDE ME.

AND AS I SAID WE HAVE A MORAL OBLIGATION TO HELP THOSE, WHO HELPED US.

AND I FEEL THE URGENCY DEEPLY.

>> Reporter: CLASHES BETWEEN THE PROTESTERS AND THE TALIBAN >> WE WENT INTO AFGHANISTAN 20 YEARS AGO BECAUSE THE TALIBAN HARBORED TERRORISTS THAT ATTACKED US ON 9/11.

AND NOW WE ARE RELYING ON THE SAME TALIBAN TO KEEP AMERICANS SAFE?

>> Reporter: THE EVACUATION PRIORITY CONTINUES.

ANYONE WHO HELPED THE U.S. EFFORT.

THERE'S CONCERN THAT THE BIDEN ADMINISTRATION IS NOT MOVING QUICKLY ENOUGH.

>> OF COURSE WE NEED TO SECURITY CHECKS, THEY NEED TO GET TO A SAFE PLACE.

>> Reporter: THE FORMER PRESIDENT OF AFGHANISTAN IS IN THE UNITED ARAB EMIRATES.

IN WASHINGTON I AM KAREN GIFFORD.

>>> IS A WAR IN AFGHANISTAN COMES TO AN END COMBAT VETERANS LOOK BACK AT 20 YEARS OF ADVANCEMENTS.

STEVE WALSH TALKED TO PEOPLE WHO RUN THE PROSTATIC SLAB AT THE BALBOA MEDICAL CENTER.

>> Reporter: THE PROSTATIC SLAB IN SAN DIEGO IS QUIETER THAN IT WAS WHEN IT OPENED 15 YEARS AGO.

NATHANIEL RUNS THE CENTER.

HE WAS ONE OF THE FIRST PATIENTS.

HE LOST HIS LEG WHEN A ROADSIDE BOMB EXPLODED UNDER HIS HUMVEE.

>> THE HUMVEE DID A BACK FLIP.

AND THE HUMVEE LANDED ON MY LEG.

>> Reporter: HE EVENTUALLY TRANSFERRED TO HIS HOMETOWN OF SAN DIEGO.

THE PENTAGON ESTIMATES 1500 TROOPS LOST ONE LIMB IN AFGHANISTAN.

>> SOME PEOPLE THRIVE AND GO BACK TO SCHOOL AND GO BACK TO WORK.

AND OTHERS HAVE NOT DONE SO WELL.

>> Reporter: SUICIDE HAS BEEN AN ISSUE FOR VETERANS.

>> WE WILL WE HAVE FOUND OVER THE YEARS THAT GETTING GUYS ON THEIR FEET AS SOON AS POSSIBLE.

I REMEMBER WHEN I GOT MY FIRST LEG THAT IT IS A BIG BOOST MENTALLY.

>> Reporter: A LOT OF WHAT MAKES PROSTATIC SO USEFUL IS THE ART OF MOLDING THE DEVICE TO ITS USER WHICH IS LARGELY DONE BY HAND.

THE NUMBER OF COMBAT INJURIES HAD FALLEN TO ALMOST ZERO.

OVER TIME LIMBS CHANGED AND SOME OF THE CLIENTS NEED NEW PROSTATIC'S .

BUT MOST NEW CLIENTS ARE TRAINING ACCIDENTS OR PEOPLE WHO'VE BEEN INJURED OFF DUTY.

>> I GAVE THEM THE RUN DOWN AND THEY WERE PRETTY IMPRESSED.

THERE IS SOME ADAPTING THAT I HAVE HAD TO GO THROUGH.

I AM STILL ADAPTING.

>> NOW I CAN RUN AND LIFT.

AND I AM PLAYING WHEELCHAIR RUGBY AND BASKETBALL.

>> HE WANTS TO RETROFIT MOTORCYCLES TO ENHANCE THE QUALITY OF LIFE FOR OTHER AMPUTEES.

PART OF THE LEGACY THAT STARTED ON A BATTLEFIELD DECADES EARLIER.

>>> THE LARGEST SOLAR POWER GENERATING FACILITY IN SAN DIEGO IS ON ITS WAY TO BEING BUILT.

JOHN CARROLL SAYS THE APPROVAL OF THE PROJECT CAME AGAINST THE OVERWHELMING OPPOSITION OF LOCAL RESIDENTS.

>> Reporter: A CUMBOLA HOT SPRINGS IS A HAMLET OF 500 PEOPLE IN FAR EASTERN SAN DIEGO COUNTY NEAR THE BORDER OF MEXICO.

TODAY SCORES OF RESIDENTS SHOWED UP.

CLAD IN YELLOW T-SHIRTS.

MAKING CLEAR THE OPPOSITION TO THE PROPOSED PROJECT.

ONE THING THAT EVERYONE AGREES ON IS THE NEED TO MOVE AWAY FROM POWER THAT'S GENERATED BY FOSSIL FUELS.

AND IF YOU LOOK AT THE DEVELOPERS OF THE PROPOSAL IT LOOKS LIKE IT FITS IN BEAUTIFULLY.

OFFSETTING HALF 1 BILLION TONS OF CO2.

PRODUCING ENOUGH POWER FOR 52,000 HOMES IN THE SAN DIEGO COUNTY AREA.

THIS IS THE RIGHT PLACE FOR THE PROJECT.

AND YOU'RE GOING TO HEAR ABOUT HOW RENEWABLE ENERGY WILL RUIN THE AREA AND WE NEED TO ALLOW CHANGES THAT WILL SAVE OUR PLANET AND THAT OPPORTUNITY IS HERE NOW.

AND WE SUPPORT THE PROJECT.

>> PLEASE HELP US SAVE OUR TOWN FROM A HUGE SOLAR PROJECT THAT WILL JEOPARDIZE OUR TOWN.

>> Reporter: THE TOWN HAS BEEN LARGELY OWNED BY JEFFREY OSBORNE AND HIS BUSINESS PARTNERS.

HE USED A MAP TO SHOW THE CURRENT TOWN IN GREEN AND THE FOOTPRINT OF THE SOLAR FARM.

BUT THIS IS THE SIZE OF SAN DIEGO INTERNATIONAL AIRPORT RIGHT NEXT TO OUR COMMUNITY AND INSIDE OUR VILLAGE BOUNDARY.

>> Reporter: THE BOARD TURNED TO DISCUSSION AND THE SUPERVISOR WAS IN FAVOR OF RENEWABLE ENERGY BUT THE PROPOSAL DID NOT SEEM EQUITABLE.

SUPERVISOR ANDERSON ECHOED THE COMMENTS THAT LED TO SPONTANEOUS MEETING'S TO 400 FEET AWAY FROM THE TOWN.

AND IN A DRAMATIC MOVE THE CEO OF THE COMPANY UPPED THE FINANCIAL COMMITMENT TO PAY FOR COMMUNITY BENEFITS.

IT ROSE TO $4 MILLION.

IT WAS THIS EXCHANGE TRIP JEFFREY OSBORNE SAYS HE HAS HIRED A LAWYER BUT DID NOT SAY IF A LAWSUIT WOULD BE FORTHCOMING.

>>> IT'S A BIT COOLER IN SAN DIEGO.

IT IS STILL A LITTLE BIT HUMID.

HOW THAT IS GOING TO CHANGE SOON BUT WE WILL WATCHES THAT DRY AIR PUSHES THE SOUTH AND SQUASHES ANY MOISTURE WE HAVE HAD.

TEMPERATURES WILL REMAIN COOL THERE IS ANOTHER WARM UP AS WE HEAD INTO THE START OF THE NEXT WORK WEEK.

AS WE MOVE IN TONIGHT TEMPERATURES WILL DROP INTO THE 60s A LITTLE BIT OF MOISTURE LINGERING AFTER THAT THINGS WILL GET MUCH DRYER.

69 DEGREES IN CHULA VISTA.

OVER IN SAN DIEGO 70 DEGREES FOR THAT OVERNIGHT LOW.

THAT MARINE LAYER IS THICKENING UP OVERNIGHT.

YOU'RE GOING TO WAKE UP TO SOME EARLY MORNING FOG AND CLOUD COVER.

ALL OF THAT SHOULD CLEAR UP AS WE HEAD INTO THE AFTERNOON HOURS WITH A LITTLE BIT MORE IN THE WAY OF SUNSHINE.

THAT TROUGH THAT WE WERE JUST TALKING ABOUT IS GOING TO PUSH FURTHER EAST AND BEHIND IT YOU GET THAT DRY AIR THAT PUSHES HIM.

TEMPERATURES WILL BE BACK UP INTO THE UPPER 70s IN OCEANSIDE.

BORREGO SPRINGS JUST SHY OF THAT TRIPLE DIGIT HEAT BY ONE DEGREE.

WE WILL RETURN TO THOSE TRIPLE DIGITS NEXT WEEK.

FINISHING OFF THE WORK WEEK WITH A NICE AND DRY NOTE.

WE WILL DRY OUT IN THE FOUR CORNERS REGION.

THAT HEAT IS GOING TO SAY COOL AND NOT BE SO INTENSE GOING TO RETURN.

NOT A LOT OF CHANGE IN CHINA AS WE HEAD INTO THE WEEK TEMPERATURES GO FROM THE UPPER 70s AND THE SLOWLY WARMING BACK INTO THE 80s.

IN THE MOUNTAINS QUITE A BIG JUMP THROUGH THE WEEKEND AS WE HEAD INTO NEXT MONDAY.

AND IN THE DESERT YOU WILL NOTICE A CHANGE OVER THE NEXT FOUR DAYS AS WE ARE BACK UP INTO THE TRIPLE DIGITS.

FOR KPBS NEWS I'M METEOROLOGIST JESSICA PASH .

>>> THE UNIVERSITY SAN DIEGO CAMPUS IS FULL OF STUDENTS FOR THE FIRST TIME IN MORE THAN A YEAR.

SCHOOL OFFICIALS HOPE THAT A UNIQUE ROBOT TOOL THAT TAPS INTO THE SCHOOLS SEWAGE SYSTEM WILL HELP CONTAIN COVID OUTBREAKS.

>> Reporter: THE ROBOTS ARE THE SIZE OF AN DOWN ROBOT PICU TAKE UP THE FIRST LID AND THERE IS A SIMPLE COMPUTER THAT CAN SCHEDULE SAMPLES THROUGHOUT THE DAY.

THE RUBBER TUBE RUNS INTO THE MANHOLE COVER AND DIRECTLY INTO A SEWER LINE.

TAKE THAT SECOND LID OFF AND YOU SEE A PLASTIC WATER BALL THAT COLLECTS SAMPLES.

THESE ROBOTS ARE DOING THE DIRTY WORK IN THE BATTLE AGAINST THE PANDEMIC.

>> IT CAN CONTINUES TO TAKE SAMPLES OVER THE 24 HOUR PERIOD.

>> IT REPRESENTS THE ENTIRE DAY NOT JUST THE MOMENT THAT WE ARE GRABBING A SAMPLE.

>> Reporter: SAMPLES ARE BROUGHT TO THE BIOLOGICAL SERVICE BUILDING DAILY.

TO BIO TECHNICIAN PREPARES THE CONTENT FOR PROCESSING.

THE SEWAGE WATER IS CONCENTRATED AND PREPARED FOR ANALYSIS.

>> THE SYSTEM HAS EVOLVED SINCE IT WAS FIRST DEPLOYED LAST SUMMER AND THAT IS IMPORTANT BECAUSE PRETTY SOON THE CAMPUS WILL BE CROWDED.

THE TESTING SYSTEM IS EXPECTED TO BE AN IMPORTANT TOOL IN THE BATTLE AGAINST COVID.

>> EVERY DAY WE ARE MAKING DEVELOPMENTS AND INCREASING THE NUMBER OF SAMPLES AND WE ARE FOCUSING ON THAT EVERY TIME WE DISCUSS THE WAY TO MAKE IT BETTER.

>> Reporter: RESULTS ARE PUT INTO THAT YOU SEE SAN DIEGO COVID DAILY DASHBOARD.

THE PANDEMIC IMPACT IS TRACKED THERE.

RECORDING HAMI PEOPLE HAVE HAD INFECTIONS IN THE PAST WEEK.

THE SEWAGE TESTING DATA IS SHARED THERE AS WELL.

>> WE HAVE AN INTERACTIVE MAP THAT IS UPDATED EVERY DAY.

IF IT'S BLUE WE DIDN'T SEE A POSITIVE SIGNAL IF IT IS RED WITH D.C. A POSITIVE SIGNAL.

BUILDINGS ARE NOTIFIED IF A SAMPLE TEST POSITIVE FOR THE VIRUS.

BECAUSE THE DATA IS UPLOADED DAILY THE HISTORY FOR MORE THAN 350 BUILDINGS CAN BE TRACKED.

>> WE CAN SEE IF IT WAS ONE INDIVIDUAL INFECTING OTHERS OR IF IT WAS PICKED UP SOMEWHERE ELSE AND BROUGHT BACK TO CAMPUS.

>> Reporter: THE DIRECTOR FOR BIOMEDICAL INNOVATION HELPED SET UP THE SYSTEM BECAUSE RESEARCHERS REALIZE THAT COVID- 19 WAS BEING TRANSMITTED BEFORE PEOPLE SHOWED ANY EXTERNAL SYMPTOMS.

>> IT INFECTS OUR GUT BEFORE IT INFECTS THE UPPER RESPIRATORY SYSTEM.

>> Reporter: EARLY TESTING LED TO THE DISCOVERY OF INFECTIONS ON CAMPUS WITH PEOPLE WHO DIDN'T REALIZE THEY HAD THE DISEASE.

BECAUSE OF THE WAY THAT THE SEWER SYSTEM WORKS POSITIVE SAMPLES WERE LINKED TO SPECIFIC BUILDINGS.

EARLY MORNINGS ARE INVALUABLE WHEN THE FULL CAMPUS POPULATION RETURNS FOR THE FIRST TIME IN MORE THAN ONE YEAR.

SPOKE YOU CAN STILL GET INFECTED WITH THE FLU VACCINATION AND INFECT OTHER PEOPLE.

SO KEEPING THE SUCCESS RATE LOW ON CAMPUS IS GOING TO REQUIRE US TO REMAIN VIGILANT.

>> Reporter: A RECENT STUDY FOUND THAT 85% OF COVID-19 CASES ON CAMPUS WERE DETECTED EARLY BY THE SEWAGE TESTING SYSTEM.

THAT MAKES IT A CRUCIAL TOOL TO CONTROL OUTBREAKS ONCE THE STUDENTS RETURNED TO CAMPUS NEXT MONTH.

ERIK ANDERSON, KPBS NEWS.

>>> YOU CAN FIND TONIGHT'S STORIES ON OUR WEBSITE WWW.KPBS.ORG.

THANK YOU FOR JOINING US I AM MAYA TRABULSI.

HAVE A GOOD EVENING.