An individual's immunity to the different variants of Covid-19 hinges on the specific variant they were first exposed to. Reuters
An individual's immunity to the different variants of Covid-19 hinges on the specific variant they were first exposed to. Reuters
An individual's immunity to the different variants of Covid-19 hinges on the specific variant they were first exposed to. Reuters
An individual's immunity to the different variants of Covid-19 hinges on the specific variant they were first exposed to. Reuters

Covid-19 tracking needed to match vaccines to variants


Marwa Hassan
  • English
  • Arabic

The efficacy of Covid-19 vaccines varies depending on the original strain with which a person was infected, a study suggests.

This discovery means that the way in which an individual's immune system targets and recognises the virus can vary based on their initial exposure.

“There's a notable difference in the focus of immune responses of different people to the Covid virus," Dr Samuel Wilks, from the University of Cambridge’s Centre for Pathogen Evolution, told The National.

“Depending on which variant they first encountered, their immune responses seem to target different specific regions of the virus," he added.

Dr Wilks further explained the practical implications: “If the virus mutates in a particular region, the immune system of some individuals might not effectively recognise the virus, potentially leading to illness.

"Given that there are such differences already after a first infection in the ways in which different immune responses are focused it shows that as new variants continue to emerge we may see mutations appearing that only effect immunity in specific subsets of the human population," he observed.

The study also highlights potential variability in the efficacy of Covid-19 vaccines among individuals. This variability might stem from differences in prior exposures to the virus variants and the consequent immune response.

"Generally, if two variants are close to each other in the map, we would expect that infection with one of the variants would provide good protection against infection from the other. For variants that are further away we would expect less protection," Dr Wilks added.

This new knowledge emphasises the importance of continuing surveillance to identify new variants and understand varying immunity levels to Covid across populations, the researchers said.

Such insights will be crucial for future vaccination strategies, which will need to consider both the specific virus variant within a vaccine and the potential variability in population response.

Different variants

Conducted in collaboration with ten research institutes, including the University of Cambridge, the findings were published in the journal Science.

For this study, 207 serum samples were collected from individuals either naturally infected with different Covid virus variants or vaccinated with the Moderna vaccine.

Research highlights the evolving challenges in immunity against Covid-19, emphasising the need for refining booster vaccines to address varied responses based on initial virus exposure. Getty Images
Research highlights the evolving challenges in immunity against Covid-19, emphasising the need for refining booster vaccines to address varied responses based on initial virus exposure. Getty Images

Notably, the immune responses exhibited marked differences depending on the initial virus variant with which an individual was infected.

Professor Derek Smith, of the University of Cambridge’s Centre for Pathogen Evolution, commented on the study's implications: “These findings enhance our understanding of how future Covid-19 booster vaccines might be refined.”

Dr Wilks said the map helps pick the best vaccine based on how close virus versions are, and since Omicron is very different from earlier versions, past infections don't offer strong protection against it.

"The group with the best protection against the Omicron variants by far was those who had received three vaccine doses," Dr Wilks said.

He also highlighted the need to identify primary virus variants for vaccine development, saying: “Identifying key virus variants for vaccine incorporation is vital for future protection.”

"As we have seen previously for flu vaccination, this simple effect of re-boosting pre-existing immunity seems to be an important effect of having a vaccination, in addition to the new immunity we hope the vaccine will generate, which depends more on the particular choice of variant in the vaccine," Dr Wilks concluded.

Immunity to Covid-19 can be acquired either through natural infection or vaccination.

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

What is graphene?

Graphene is a single layer of carbon atoms arranged like honeycomb.

It was discovered in 2004, when Russian-born Manchester scientists Andrei Geim and Kostya Novoselov were "playing about" with sticky tape and graphite - the material used as "lead" in pencils.

Placing the tape on the graphite and peeling it, they managed to rip off thin flakes of carbon. In the beginning they got flakes consisting of many layers of graphene. But as they repeated the process many times, the flakes got thinner.

By separating the graphite fragments repeatedly, they managed to create flakes that were just one atom thick. Their experiment had led to graphene being isolated for the very first time.

At the time, many believed it was impossible for such thin crystalline materials to be stable. But examined under a microscope, the material remained stable, and when tested was found to have incredible properties.

It is many times times stronger than steel, yet incredibly lightweight and flexible. It is electrically and thermally conductive but also transparent. The world's first 2D material, it is one million times thinner than the diameter of a single human hair.

But the 'sticky tape' method would not work on an industrial scale. Since then, scientists have been working on manufacturing graphene, to make use of its incredible properties.

In 2010, Geim and Novoselov were awarded the Nobel Prize for Physics. Their discovery meant physicists could study a new class of two-dimensional materials with unique properties. 

 

Roll of honour 2019-2020

Dubai Rugby Sevens
Winners: Dubai Hurricanes
Runners up: Bahrain

West Asia Premiership
Winners: Bahrain
Runners up: UAE Premiership

UAE Premiership
}Winners: Dubai Exiles
Runners up: Dubai Hurricanes

UAE Division One
Winners: Abu Dhabi Saracens
Runners up: Dubai Hurricanes II

UAE Division Two
Winners: Barrelhouse
Runners up: RAK Rugby

Company profile

Name: Thndr

Started: October 2020

Founders: Ahmad Hammouda and Seif Amr

Based: Cairo, Egypt

Sector: FinTech

Initial investment: pre-seed of $800,000

Funding stage: series A; $20 million

Investors: Tiger Global, Beco Capital, Prosus Ventures, Y Combinator, Global Ventures, Abdul Latif Jameel, Endure Capital, 4DX Ventures, Plus VC,  Rabacap and MSA Capital

How the bonus system works

The two riders are among several riders in the UAE to receive the top payment of £10,000 under the Thank You Fund of £16 million (Dh80m), which was announced in conjunction with Deliveroo's £8 billion (Dh40bn) stock market listing earlier this year.

The £10,000 (Dh50,000) payment is made to those riders who have completed the highest number of orders in each market.

There are also riders who will receive payments of £1,000 (Dh5,000) and £500 (Dh2,500).

All riders who have worked with Deliveroo for at least one year and completed 2,000 orders will receive £200 (Dh1,000), the company said when it announced the scheme.

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%3Cp%3E%3Cstrong%3EDirector%3A%3C%2Fstrong%3E%20Nikhil%20Nagesh%20Bhat%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStarring%3C%2Fstrong%3E%3A%20Lakshya%2C%20Tanya%20Maniktala%2C%20Ashish%20Vidyarthi%2C%20Harsh%20Chhaya%2C%20Raghav%20Juyal%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ERating%3A%3C%2Fstrong%3E%204.5%2F5%3Cbr%3E%3C%2Fp%3E%0A
F1 The Movie

Starring: Brad Pitt, Damson Idris, Kerry Condon, Javier Bardem

Director: Joseph Kosinski

Rating: 4/5

'Lost in Space'

Creators: Matt Sazama, Burk Sharpless, Irwin Allen

Stars: Molly Parker, Toby Stephens, Maxwell Jenkins

Rating: 4/5

if you go

The flights
Emirates flies to Delhi with fares starting from around Dh760 return, while Etihad fares cost about Dh783 return. From Delhi, there are connecting flights to Lucknow. 
Where to stay
It is advisable to stay in Lucknow and make a day trip to Kannauj. A stay at the Lebua Lucknow hotel, a traditional Lucknowi mansion, is recommended. Prices start from Dh300 per night (excluding taxes). 

Jetour T1 specs

Engine: 2-litre turbocharged

Power: 254hp

Torque: 390Nm

Price: From Dh126,000

Available: Now

Lexus LX700h specs

Engine: 3.4-litre twin-turbo V6 plus supplementary electric motor

Power: 464hp at 5,200rpm

Torque: 790Nm from 2,000-3,600rpm

Transmission: 10-speed auto

Fuel consumption: 11.7L/100km

On sale: Now

Price: From Dh590,000

The specs

AT4 Ultimate, as tested

Engine: 6.2-litre V8

Power: 420hp

Torque: 623Nm

Transmission: 10-speed automatic

Price: From Dh330,800 (Elevation: Dh236,400; AT4: Dh286,800; Denali: Dh345,800)

On sale: Now

How to wear a kandura

Dos

  • Wear the right fabric for the right season and occasion 
  • Always ask for the dress code if you don’t know
  • Wear a white kandura, white ghutra / shemagh (headwear) and black shoes for work 
  • Wear 100 per cent cotton under the kandura as most fabrics are polyester

Don’ts 

  • Wear hamdania for work, always wear a ghutra and agal 
  • Buy a kandura only based on how it feels; ask questions about the fabric and understand what you are buying
Know before you go
  • Jebel Akhdar is a two-hour drive from Muscat airport or a six-hour drive from Dubai. It’s impossible to visit by car unless you have a 4x4. Phone ahead to the hotel to arrange a transfer.
  • If you’re driving, make sure your insurance covers Oman.
  • By air: Budget airlines Air Arabia, Flydubai and SalamAir offer direct routes to Muscat from the UAE.
  • Tourists from the Emirates (UAE nationals not included) must apply for an Omani visa online before arrival at evisa.rop.gov.om. The process typically takes several days.
  • Flash floods are probable due to the terrain and a lack of drainage. Always check the weather before venturing into any canyons or other remote areas and identify a plan of escape that includes high ground, shelter and parking where your car won’t be overtaken by sudden downpours.

 

ELECTION%20RESULTS
%3Cp%3EMacron%E2%80%99s%20Ensemble%20group%20won%20245%20seats.%26nbsp%3B%3C%2Fp%3E%0A%3Cp%3EThe%20second-largest%20group%20in%20parliament%20is%20Nupes%2C%20a%20leftist%20coalition%20led%20by%20Jean-Luc%20Melenchon%2C%20which%20gets%20131%20lawmakers.%26nbsp%3B%3C%2Fp%3E%0A%3Cp%3EThe%20far-right%20National%20Rally%20fared%20much%20better%20than%20expected%20with%2089%20seats.%3C%2Fp%3E%0A%3Cp%3EThe%20centre-right%20Republicans%20and%20their%20allies%20took%2061.%3C%2Fp%3E%0A
Shipping%20and%20banking%20
%3Cp%3EThe%20sixth%20sanctions%20package%20will%20also%20see%20European%20insurers%20banned%20from%20covering%20Russian%20shipping%2C%20more%20individuals%20added%20to%20the%20EU's%20sanctions%20list%20and%20Russia's%20Sberbank%20cut%20off%20from%20international%20payments%20system%20Swift.%3C%2Fp%3E%0A

Bareilly Ki Barfi
Directed by: Ashwiny Iyer Tiwari
Starring: Kriti Sanon, Ayushmann Khurrana, Rajkummar Rao
Three and a half stars

UAE currency: the story behind the money in your pockets
BUNDESLIGA FIXTURES

Saturday, May 16 (kick-offs UAE time)

Borussia Dortmund v Schalke (4.30pm) 
RB Leipzig v Freiburg (4.30pm) 
Hoffenheim v Hertha Berlin (4.30pm) 
Fortuna Dusseldorf v Paderborn  (4.30pm) 
Augsburg v Wolfsburg (4.30pm) 
Eintracht Frankfurt v Borussia Monchengladbach (7.30pm)

Sunday, May 17

Cologne v Mainz (4.30pm),
Union Berlin v Bayern Munich (7pm)

Monday, May 18

Werder Bremen v Bayer Leverkusen (9.30pm)

Specs

Engine: Duel electric motors
Power: 659hp
Torque: 1075Nm
On sale: Available for pre-order now
Price: On request

Most sought after workplace benefits in the UAE
  • Flexible work arrangements
  • Pension support
  • Mental well-being assistance
  • Insurance coverage for optical, dental, alternative medicine, cancer screening
  • Financial well-being incentives 
ULTRA PROCESSED FOODS

- Carbonated drinks, sweet or savoury packaged snacks, confectionery, mass-produced packaged breads and buns 

- margarines and spreads; cookies, biscuits, pastries, cakes, and cake mixes, breakfast cereals, cereal and energy bars;

- energy drinks, milk drinks, fruit yoghurts and fruit drinks, cocoa drinks, meat and chicken extracts and instant sauces

- infant formulas and follow-on milks, health and slimming products such as powdered or fortified meal and dish substitutes,

- many ready-to-heat products including pre-prepared pies and pasta and pizza dishes, poultry and fish nuggets and sticks, sausages, burgers, hot dogs, and other reconstituted meat products, powdered and packaged instant soups, noodles and desserts.

How the UAE gratuity payment is calculated now

Employees leaving an organisation are entitled to an end-of-service gratuity after completing at least one year of service.

The tenure is calculated on the number of days worked and does not include lengthy leave periods, such as a sabbatical. If you have worked for a company between one and five years, you are paid 21 days of pay based on your final basic salary. After five years, however, you are entitled to 30 days of pay. The total lump sum you receive is based on the duration of your employment.

1. For those who have worked between one and five years, on a basic salary of Dh10,000 (calculation based on 30 days):

a. Dh10,000 ÷ 30 = Dh333.33. Your daily wage is Dh333.33

b. Dh333.33 x 21 = Dh7,000. So 21 days salary equates to Dh7,000 in gratuity entitlement for each year of service. Multiply this figure for every year of service up to five years.

2. For those who have worked more than five years

c. 333.33 x 30 = Dh10,000. So 30 days’ salary is Dh10,000 in gratuity entitlement for each year of service.

Note: The maximum figure cannot exceed two years total salary figure.

Red flags
  • Promises of high, fixed or 'guaranteed' returns.
  • Unregulated structured products or complex investments often used to bypass traditional safeguards.
  • Lack of clear information, vague language, no access to audited financials.
  • Overseas companies targeting investors in other jurisdictions - this can make legal recovery difficult.
  • Hard-selling tactics - creating urgency, offering 'exclusive' deals.

Courtesy: Carol Glynn, founder of Conscious Finance Coaching

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
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%3Cp%3EAverage%20amount%20of%20biofuel%20produced%20at%20DIC%20factory%20every%20month%3A%20%3Cstrong%3EApproximately%20106%2C000%20litres%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3EAmount%20of%20biofuel%20produced%20from%201%20litre%20of%20used%20cooking%20oil%3A%20%3Cstrong%3E920ml%20(92%25)%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3ETime%20required%20for%20one%20full%20cycle%20of%20production%20from%20used%20cooking%20oil%20to%20biofuel%3A%20%3Cstrong%3EOne%20day%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3EEnergy%20requirements%20for%20one%20cycle%20of%20production%20from%201%2C000%20litres%20of%20used%20cooking%20oil%3A%3Cbr%3E%3Cstrong%3E%E2%96%AA%20Electricity%20-%201.1904%20units%3Cbr%3E%E2%96%AA%20Water-%2031%20litres%3Cbr%3E%E2%96%AA%20Diesel%20%E2%80%93%2026.275%20litres%3C%2Fstrong%3E%3C%2Fp%3E%0A
COMPANY PROFILE

Company name: SimpliFi

Started: August 2021

Founder: Ali Sattar

Based: UAE

Industry: Finance, technology

Investors: 4DX, Rally Cap, Raed, Global Founders, Sukna and individuals

The five pillars of Islam

1. Fasting 

2. Prayer 

3. Hajj 

4. Shahada 

5. Zakat 

While you're here
Updated: October 05, 2023, 6:00 PM`