A nurse at a UAE hospital carries out an antibody test on a patient. Reem Mohammed / The National
A nurse at a UAE hospital carries out an antibody test on a patient. Reem Mohammed / The National
A nurse at a UAE hospital carries out an antibody test on a patient. Reem Mohammed / The National
A nurse at a UAE hospital carries out an antibody test on a patient. Reem Mohammed / The National

I took an antibody test after receiving my Covid-19 vaccine. Here's what I learnt


Gillian Duncan
  • English
  • Arabic

More than 40 per cent of the UAE population has now received at least one dose of a vaccine against Covid-19.

On January 4, I received my second shot of the Sinopharm vaccine.

Five weeks later, I was keen to learn how my body had responded, so I booked myself in for a serology test.

That scanned my blood for antibodies to two Sars-Cov-2 proteins, as well as a “quality check” of their neutralising abilities against the virus.

So, what is the test? And should we all be doing it?

The National explains.

What are antibodies – and what does the test do?

Antibodies are proteins that help to fight off infections and can provide protection against getting that disease again.

I took a quantitative test, which measures the level of antibodies in a person's blood against the Sars-Cov-2 virus, which causes Covid-19.

It provides three results, with levels of two antibodies: one against the N protein – or nucleocapsid – which is found inside the virus; and one against the spike or S, on the surface, which the virus uses to enter our bodies.

The third result provides a simple positive or negative result for neutralising antibodies.

Scientists have discovered that people who have been infected with Sars-Cov-2 make antibodies against the N protein and the spike.

But people who have received vaccines against Covid-19 – including the Sinopharm vaccine, the most widely used shot in the UAE – tend to make antibodies mainly against one protein: the spike. These are known as anti-S or anti-spike antibodies.

Often people who have received a Covid-19 vaccine do not usually make anti-N antibodies.

That's according to Dr Sally Mahmoud, lab director at Biogenix Labs, part of G42 Healthcare, an Abu Dhabi technology company that helped lead trials of the Sinopharm vaccine.

People who take the test after receiving a Covid-19 vaccine should not be surprised if the result is negative for anti-N antibodies, she said.

Only "a small fraction" test positive for anti-N antibodies after vaccination, Dr Mahmoud said.

My results

  • Immunoglobulin G (IgG) Anti-N antibodies: 4.86 (negative is less than 1.4, positive is more than 1.4)
  • IgG Anti-S antibodies: 124 (negative is 12 or less, borderline is 12-15, positive is more than 15)
  • Neutralising antibodies: positive

What does that mean?

I should be well protected.

I have enough neutralising antibodies and both other results were strongly positive.

The anti-S or anti-spike antibodies are "very good", Dr Mahmoud said, which should prevent the virus from entering my cells.

The high level of anti-N antibodies – which are usually reflected more during infection than vaccination – should prevent the virus from progressing, if it does manage to invade my cells.

The level of my anti-N antibodies probably means I had the virus before being vaccinated against it, said Dr Mahmoud.

This was news to me.

It's very possible you had Covid-19

“It’s very possible you had it,” she said.

“I cannot prove it of course, because there is a fraction who do respond to the vaccine with anti-N.

“But of the small fraction, we reckon whoever had the anti-N most probably was previously infected. However, we cannot yet prove that, we need to complete our studies.”

This is perfectly possible, as the virus affects everyone differently.

Up to a third of people who contract Covid-19 are completely asymptomatic.

“People who have been vaccinated after infection have had a better response to the vaccine, of course, because it is like a second infection,” she said.

"The body responds even better than just vaccination," she said, as the antibody concentrations  "are usually much higher than in people who are only vaccinated, or only infected".

How does Sinopharm compare to Pfizer-BioNTech?

Theoretically, because Sinopharm is an inactivated vaccine – a 'killed' virus – the immune response should be broader than Pfizer-BioNTech, which is designed to induce antibodies to the spike only.

However, medics are still examining how effective any vaccine is against new strains, including the Sinopharm shot.

What is an average result?

That is a hard question to answer, Dr Mahmoud said.

Anything above 15 arbitrary units per millilitre is positive for the anti-S antibody test. However, a typical result after the Sinopharm vaccine is anything between 50au/ml to 150au/ml.

But although rare, the lab has seen people with levels below 20 and above 1,000, she said.

For the anti-N antibody test, anything above 1.4 is positive.

The test to check for neutralising antibodies is a straight positive above 30 per cent, or negative if below that.

What does a higher result mean?

The higher the value, the better response to the vaccine, and the better immune response, Dr Mahmoud said.

“Higher antibodies stay for longer and are said to give better protection than lower antibodies," she said.”

Should we all be taking this test?

This quantitative serology test is not one that has been widely carried out in other countries – and not something UAE authorities urge people to get. But it is available in some hospitals in the UAE, mostly in Abu Dhabi.

Other doctors said more research is needed.

"Some vaccines remain in our body for life – that's why we need only one dose when we take a childhood vaccine," said Dr Anitha Varghese, a general practitioner at Aster Jubilee Medical Centre in Dubai.

"When it comes to Covid-19, it's very new. We still don’t know how long the cells’ memory to kill the virus lasts.”

She said antibody tests could help determine whether people vaccinated against Covid-19 would require regular booster injections.

Hospitals in Dubai previously told The National the tests were not available there, at the request of the authorities.

In Abu Dhabi, the test typically costs about Dh300 ($81).

How long do antibodies last?

Scientists are still working out the answer to that. It really depends on a person's immune system.

"Some people we have been monitoring, they have had the antibodies for almost eight months now," Dr Mahmoud said.

"Other people have had a drop in antibodies after a couple of months, so getting this average number is ongoing.

“We’re still doing the research.”

Does recovering from the virus give as much protection as getting the vaccine?

Only for a short period, Dr Mahmoud said.

"Depending on the strength of the infection, people with severe infections do respond with very high antibody levels," she added.

“But we have seen the antibody levels drop very quickly after infection.”

Antibodies produced after vaccination appear to last longer. However, this needed to be confirmed by research, she said.

The burning issue

The internal combustion engine is facing a watershed moment – major manufacturer Volvo is to stop producing petroleum-powered vehicles by 2021 and countries in Europe, including the UK, have vowed to ban their sale before 2040. The National takes a look at the story of one of the most successful technologies of the last 100 years and how it has impacted life in the UAE. 

Read part four: an affection for classic cars lives on

Read part three: the age of the electric vehicle begins

Read part two: how climate change drove the race for an alternative 

Ziina users can donate to relief efforts in Beirut

Ziina users will be able to use the app to help relief efforts in Beirut, which has been left reeling after an August blast caused an estimated $15 billion in damage and left thousands homeless. Ziina has partnered with the United Nations High Commissioner for Refugees to raise money for the Lebanese capital, co-founder Faisal Toukan says. “As of October 1, the UNHCR has the first certified badge on Ziina and is automatically part of user's top friends' list during this campaign. Users can now donate any amount to the Beirut relief with two clicks. The money raised will go towards rebuilding houses for the families that were impacted by the explosion.”

DEADPOOL & WOLVERINE

Starring: Ryan Reynolds, Hugh Jackman, Emma Corrin

Director: Shawn Levy

Rating: 3/5

The%C2%A0specs%20
%3Cp%3E%0D%3Cstrong%3EEngine%3A%20%3C%2Fstrong%3E6-cylinder%2C%204.8-litre%20%0D%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3E5-speed%20automatic%20and%20manual%0D%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E280%20brake%20horsepower%20%0D%3Cbr%3E%3Cstrong%3ETorque%3A%20%3C%2Fstrong%3E451Nm%20%0D%3Cbr%3E%3Cstrong%3EPrice%3A%20%3C%2Fstrong%3Efrom%20Dh153%2C00%0D%3Cbr%3E%3Cstrong%3EOn%20sale%3A%20%3C%2Fstrong%3Enow%3C%2Fp%3E%0A
Tonight's Chat on The National

Tonight's Chat is a series of online conversations on The National. The series features a diverse range of celebrities, politicians and business leaders from around the Arab world.

Tonight’s Chat host Ricardo Karam is a renowned author and broadcaster with a decades-long career in TV. He has previously interviewed Bill Gates, Carlos Ghosn, Andre Agassi and the late Zaha Hadid, among others. Karam is also the founder of Takreem.

Intellectually curious and thought-provoking, Tonight’s Chat moves the conversation forward.

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Chef Nobu's advice for eating sushi

“One mistake people always make is adding extra wasabi. There is no need for this, because it should already be there between the rice and the fish.
“When eating nigiri, you must dip the fish – not the rice – in soy sauce, otherwise the rice will collapse. Also, don’t use too much soy sauce or it will make you thirsty. For sushi rolls, dip a little of the rice-covered roll lightly in soy sauce and eat in one bite.
“Chopsticks are acceptable, but really, I recommend using your fingers for sushi. Do use chopsticks for sashimi, though.
“The ginger should be eaten separately as a palette cleanser and used to clear the mouth when switching between different pieces of fish.”

Results

2.30pm: Dubai Creek Tower – Handicap (PA) Dh40,000 (Dirt) 1,200m; Winner: Marmara Xm, Gary Sanchez (jockey), Abdelkhir Adam (trainer)

3pm: Al Yasmeen – Maiden (PA) Dh40,000 (D) 1,700m; Winner: AS Hajez, Jesus Rosales, Khalifa Al Neyadi

3.30pm: Al Ferdous – Maiden (PA) Dh40,000 (D) 1,700m; Winner: Soukainah, Sebastien Martino, Jean-Claude Pecout

4pm: The Crown Prince Of Sharjah – Prestige (PA) Dh200,000 (D) 1,200m; Winner: AF Thayer, Ray Dawson, Ernst Oertel

4.30pm: Sheikh Ahmed bin Rashid Al Maktoum Cup – Handicap (TB) Dh200,000 (D) 2,000m; Winner: George Villiers, Antonio Fresu, Bhupat Seemar

5pm: Palma Spring – Handicap (PA) Dh40,000 (D) 2,000m; Winner: Es Abu Mousa, Antonio Fresu, Abubakar Daud

Benefits of first-time home buyers' scheme
  • Priority access to new homes from participating developers
  • Discounts on sales price of off-plan units
  • Flexible payment plans from developers
  • Mortgages with better interest rates, faster approval times and reduced fees
  • DLD registration fee can be paid through banks or credit cards at zero interest rates
Kamindu Mendis bio

Full name: Pasqual Handi Kamindu Dilanka Mendis

Born: September 30, 1998

Age: 20 years and 26 days

Nationality: Sri Lankan

Major teams Sri Lanka's Under 19 team

Batting style: Left-hander

Bowling style: Right-arm off-spin and slow left-arm orthodox (that's right!)

RESULTS

Bantamweight: Jalal Al Daaja (JOR) beat Hamza Bougamza (MAR)

Catchweight 67kg: Mohamed El Mesbahi (MAR) beat Fouad Mesdari (ALG)

Lightweight: Abdullah Mohammed Ali (UAE) beat Abdelhak Amhidra (MAR)

Catchweight 73kg: Mosatafa Ibrahim Radi (PAL) beat Yazid Chouchane (ALG)

Middleweight: Yousri Belgaroui (TUN) beat Badreddine Diani (MAR)

Catchweight 78KG: Rashed Dawood (UAE) beat Adnan Bushashy (ALG)

Middleweight: Sallah-Eddine Dekhissi (MAR) beat Abdel Enam (EGY)

Catchweight 65kg: Yanis Ghemmouri (ALG) beat Rachid Hazoume (MAR)

Lightweight: Mohammed Yahya (UAE) beat Azouz Anwar (EGY)

Catchweight 79kg: Souhil Tahiri (ALG) beat Omar Hussein (PAL)

Middleweight: Tarek Suleiman (SYR) beat Laid Zerhouni (ALG)

If you go

The flights

There are direct flights from Dubai to Sofia with FlyDubai (www.flydubai.com) and Wizz Air (www.wizzair.com), from Dh1,164 and Dh822 return including taxes, respectively.

The trip

Plovdiv is 150km from Sofia, with an hourly bus service taking around 2 hours and costing $16 (Dh58). The Rhodopes can be reached from Sofia in between 2-4hours.

The trip was organised by Bulguides (www.bulguides.com), which organises guided trips throughout Bulgaria. Guiding, accommodation, food and transfers from Plovdiv to the mountains and back costs around 170 USD for a four-day, three-night trip.

 

UAE currency: the story behind the money in your pockets
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%3Cp%3E%3Cstrong%3EName%3A%3C%2Fstrong%3E%20JustClean%3Cbr%3E%3Cbr%3E%3Cstrong%3EBased%3A%20%3C%2Fstrong%3EDubai%20with%20offices%20in%20other%20GCC%20countries%3Cbr%3E%3Cbr%3E%3Cstrong%3ELaunch%20year%3A%3C%2Fstrong%3E%202016%3Cbr%3E%3Cbr%3E%3Cstrong%3ENumber%20of%20employees%3A%3C%2Fstrong%3E%20160%2B%20with%2021%20nationalities%20in%20eight%20cities%3Cbr%3E%3Cstrong%3E%3Cbr%3ESector%3A%3C%2Fstrong%3E%20online%20laundry%20and%20cleaning%20services%3Cbr%3E%3Cbr%3E%3Cstrong%3EFunding%3A%20%3C%2Fstrong%3E%2430m%20from%20Kuwait-based%20Faith%20Capital%20Holding%20and%20Gulf%20Investment%20Corporation%3C%2Fp%3E%0A
The%20specs
%3Cp%3E%3Cstrong%3EEngine%3A%20%3C%2Fstrong%3E2.3-litre%204cyl%20turbo%0D%3Cbr%3E%3Cstrong%3EPower%3A%20%3C%2Fstrong%3E299hp%20at%205%2C500rpm%0D%3Cbr%3E%3Cstrong%3ETorque%3A%20%3C%2Fstrong%3E420Nm%20at%202%2C750rpm%0D%3Cbr%3E%3Cstrong%3ETransmission%3A%20%3C%2Fstrong%3E10-speed%20auto%0D%3Cbr%3E%3Cstrong%3EFuel%20consumption%3A%20%3C%2Fstrong%3E12.4L%2F100km%0D%3Cbr%3E%3Cstrong%3EOn%20sale%3A%20%3C%2Fstrong%3ENow%0D%3Cbr%3E%3Cstrong%3EPrice%3A%20%3C%2Fstrong%3EFrom%20Dh157%2C395%20(XLS)%3B%20Dh199%2C395%20(Limited)%3C%2Fp%3E%0A

North Pole stats

Distance covered: 160km

Temperature: -40°C

Weight of equipment: 45kg

Altitude (metres above sea level): 0

Terrain: Ice rock

South Pole stats

Distance covered: 130km

Temperature: -50°C

Weight of equipment: 50kg

Altitude (metres above sea level): 3,300

Terrain: Flat ice
 

Volvo ES90 Specs

Engine: Electric single motor (96kW), twin motor (106kW) and twin motor performance (106kW)

Power: 333hp, 449hp, 680hp

Torque: 480Nm, 670Nm, 870Nm

On sale: Later in 2025 or early 2026, depending on region

Price: Exact regional pricing TBA

In numbers

1,000 tonnes of waste collected daily:

  • 800 tonnes converted into alternative fuel
  • 150 tonnes to landfill
  • 50 tonnes sold as scrap metal

800 tonnes of RDF replaces 500 tonnes of coal

Two conveyor lines treat more than 350,000 tonnes of waste per year

25 staff on site

 

Indoor cricket in a nutshell

Indoor Cricket World Cup – Sep 16-20, Insportz, Dubai

16 Indoor cricket matches are 16 overs per side

8 There are eight players per team

There have been nine Indoor Cricket World Cups for men. Australia have won every one.

5 Five runs are deducted from the score when a wickets falls

Batsmen bat in pairs, facing four overs per partnership

Scoring In indoor cricket, runs are scored by way of both physical and bonus runs. Physical runs are scored by both batsmen completing a run from one crease to the other. Bonus runs are scored when the ball hits a net in different zones, but only when at least one physical run is score.

Zones

A Front net, behind the striker and wicketkeeper: 0 runs

B Side nets, between the striker and halfway down the pitch: 1 run

Side nets between halfway and the bowlers end: 2 runs

Back net: 4 runs on the bounce, 6 runs on the full

UAE%20athletes%20heading%20to%20Paris%202024
%3Cp%3E%3Cstrong%3EEquestrian%3C%2Fstrong%3E%3Cbr%3EAbdullah%20Humaid%20Al%20Muhairi%2C%20Abdullah%20Al%20Marri%2C%20Omar%20Al%20Marzooqi%2C%20Salem%20Al%20Suwaidi%2C%20and%20Ali%20Al%20Karbi%20(four%20to%20be%20selected).%3Cbr%3E%3Cstrong%3EJudo%3C%2Fstrong%3E%3Cbr%3EMen%3A%20Narmandakh%20Bayanmunkh%20(66kg)%2C%20Nugzari%20Tatalashvili%20(81kg)%2C%20Aram%20Grigorian%20(90kg)%2C%20Dzhafar%20Kostoev%20(100kg)%2C%20Magomedomar%20Magomedomarov%20(%2B100kg)%3B%20women's%20Khorloodoi%20Bishrelt%20(52kg).%3Cbr%3E%3Cbr%3E%3Cstrong%3ECycling%3C%2Fstrong%3E%3Cbr%3ESafia%20Al%20Sayegh%20(women's%20road%20race).%3Cbr%3E%3Cbr%3E%3Cstrong%3ESwimming%3C%2Fstrong%3E%3Cbr%3EMen%3A%20Yousef%20Rashid%20Al%20Matroushi%20(100m%20freestyle)%3B%20women%3A%20Maha%20Abdullah%20Al%20Shehi%20(200m%20freestyle).%3Cbr%3E%3Cbr%3E%3Cstrong%3EAthletics%3C%2Fstrong%3E%3Cbr%3EMaryam%20Mohammed%20Al%20Farsi%20(women's%20100%20metres).%3C%2Fp%3E%0A
Scoreline

Arsenal 3
Aubameyang (28'), Welbeck (38', 81')
Red cards: El Neny (90' 3)

Southampton 2
Long (17'), Austin (73')
Red cards: Stephens (90' 2)

Key facilities
  • Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
  • Premier League-standard football pitch
  • 400m Olympic running track
  • NBA-spec basketball court with auditorium
  • 600-seat auditorium
  • Spaces for historical and cultural exploration
  • An elevated football field that doubles as a helipad
  • Specialist robotics and science laboratories
  • AR and VR-enabled learning centres
  • Disruption Lab and Research Centre for developing entrepreneurial skills
SPEC%20SHEET%3A%20APPLE%20IPHONE%2014
%3Cp%3E%3Cstrong%3EDisplay%3A%3C%2Fstrong%3E%C2%A06.1%22%20Super%20Retina%20XDR%20OLED%2C%202532%20x%201170%2C%20460ppi%2C%20HDR%2C%20True%20Tone%2C%20P3%2C%201200%20nits%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EProcessor%3A%3C%2Fstrong%3E%C2%A0A15%20Bionic%2C%206-core%20CPU%2C%205-core%20GPU%2C%2016-core%20Neural%20Engine%C2%A0%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMemory%3A%3C%2Fstrong%3E%C2%A06GB%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ECapacity%3A%3C%2Fstrong%3E%C2%A0128%2F256%2F512GB%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EPlatform%3A%3C%2Fstrong%3E%C2%A0iOS%2016%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMain%20camera%3A%3C%2Fstrong%3E%C2%A0Dual%2012MP%20main%20(f%2F1.5)%20%2B%2012MP%20ultra-wide%20(f%2F2.4)%3B%202x%20optical%2C%205x%20digital%3B%20Photonic%20Engine%2C%20Deep%20Fusion%2C%20Smart%20HDR%204%2C%20Portrait%20Lighting%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMain%20camera%20video%3A%3C%2Fstrong%3E%C2%A04K%20%40%2024%2F25%2F3060fps%2C%20full-HD%20%40%2025%2F30%2F60fps%2C%20HD%20%40%2030fps%3B%20HD%20slo-mo%20%40%20120%2F240fps%3B%20night%2C%20time%20lapse%2C%20cinematic%2C%20action%20modes%3B%20Dolby%20Vision%2C%204K%20HDR%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EFront%20camera%3A%3C%2Fstrong%3E%C2%A012MP%20TrueDepth%20(f%2F1.9)%2C%20Photonic%20Engine%2C%20Deep%20Fusion%2C%20Smart%20HDR%204%3B%20Animoji%2C%20Memoji%3B%20Portrait%20Lighting%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EFront%20camera%20video%3A%3C%2Fstrong%3E%204K%20%40%2024%2F25%2F3060fps%2C%20full-HD%20%40%2025%2F30%2F60fps%2C%20HD%20slo-mo%20%40%20120fps%3B%20night%2C%20time%20lapse%2C%20cinematic%2C%20action%20modes%3B%20Dolby%20Vision%2C%204K%20HDR%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EBattery%3A%3C%2Fstrong%3E%C2%A03279%20mAh%2C%C2%A0up%20to%2020h%20video%2C%2016h%20streaming%20video%2C%2080h%20audio%3B%20fast%20charge%20to%2050%25%20in%2030m%3B%20MagSafe%2C%20Qi%20wireless%20charging%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EConnectivity%3A%3C%2Fstrong%3E%C2%A0Wi-Fi%2C%20Bluetooth%205.3%2C%20NFC%20(Apple%20Pay)%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EBiometrics%3A%3C%2Fstrong%3E%20Face%20ID%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EI%2FO%3A%3C%2Fstrong%3E%C2%A0Lightning%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ECards%3A%3C%2Fstrong%3E%C2%A0Dual%20eSIM%20%2F%20eSIM%20%2B%20SIM%20(US%20models%20use%20eSIMs%20only)%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EColours%3A%3C%2Fstrong%3E%C2%A0Blue%2C%20midnight%2C%20purple%2C%20starlight%2C%20Product%20Red%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EIn%20the%20box%3A%3C%2Fstrong%3E%C2%A0iPhone%2014%2C%20USB-C-to-Lightning%20cable%2C%20one%20Apple%20sticker%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EPrice%3A%3C%2Fstrong%3E%C2%A0Dh3%2C399%20%2F%20Dh3%2C799%20%2F%20Dh4%2C649%3C%2Fp%3E%0A
The specs
 
Engine: 3.0-litre six-cylinder turbo
Power: 398hp from 5,250rpm
Torque: 580Nm at 1,900-4,800rpm
Transmission: Eight-speed auto
Fuel economy, combined: 6.5L/100km
On sale: December
Price: From Dh330,000 (estimate)
What are the influencer academy modules?
  1. Mastery of audio-visual content creation. 
  2. Cinematography, shots and movement.
  3. All aspects of post-production.
  4. Emerging technologies and VFX with AI and CGI.
  5. Understanding of marketing objectives and audience engagement.
  6. Tourism industry knowledge.
  7. Professional ethics.
Specs

Engine: 51.5kW electric motor

Range: 400km

Power: 134bhp

Torque: 175Nm

Price: From Dh98,800

Available: Now