Covid-19 could be linked to a spate of cases involving severe liver inflammation in children reported in more than a dozen countries worldwide, scientists have said.
At least 348 children have been diagnosed with unexplained hepatitis, forcing some to undergo liver transplants. A small number have died.
The cases are predominantly in children under 5, who showed initial symptoms of gastroenteritis, including diarrhoea and nausea, followed by the onset of jaundice.
Many of the children were found to be infected with an adenovirus infection, which is believed to play a role in the development of the condition.
Adenoviruses are a group of common viruses that infect the lining of the eyes, airways and lungs, intestines, urinary tract, and nervous system.
Yet experts said it does not fully explain their symptoms, because adenovirus does not typically cause hepatitis in healthy children.
However, a new theory shared in The Lancet, the British medical journal, said a coronavirus infection could be at the root of the cause.
According to the hypothesis, a Covid-19 infection could linger in the gastroenterological tract of the children affected, where it could come into contact with the adenovirus, causing the immune system to overreact.
“Sars-CoV-2 viral persistence in the gastrointestinal tract can lead to the repeated release of viral proteins across the intestinal epithelium, giving rise to immune activation,” wrote the authors of the correspondence, which appeared in the Lancet Gastroenterology & Hepatology.
Investigations recently turned towards previous exposure and infections with Covid.
"Over the past week, there's been some important progress with the further investigations and some refinements of the working hypotheses," said Philippa Easterbrook, from the WHO's global hepatitis programme, last week.
"At present, the leading hypotheses remain those which involve adenovirus ― with also still an important consideration about the role of Covid as well, either as a co-infection or a past infection," Ms Easterbrook said.
Experts said the cause is still speculative and research is continuing.
Dr Bharat Pankhania, a senior consultant in communicable disease control and senior lecturer at the University of Exeter in the UK, said “it could well be” that two factors are causing the hepatitis cases in children.
“A sensitised immune system with Covid, and that immune system acts exuberantly and causes hepatitis,” he said. “At this moment we don’t know for sure.
“Could it be triggered by an infectious agent? Your immune system is perked up, and another infection comes along, and the two infections together make the situation a lot worse.
“We’re exploring that second hypothesis. It could be a complex cascade of immune responses causing it.”
Prof Ian Jones, a professor of virology at the University of Reading in the UK, said the hypothesis involving Covid-19 “seems plausible”. However, he added it was unclear why the children have suffered hepatitis specifically, rather than wider symptoms caused by over-activation of the immune system.
“I would have thought if you had hyperactivity, you would’ve had a range of symptoms,” he said.
“Why are you seeing the focus on the liver, why aren’t there general inflammatory [symptoms affecting] other organs like the skin or kidney or even the lungs?”
Prof Eskild Petersen, of Aarhus University Hospital in Denmark and chairperson of the European Society of Clinical Microbiology and Infectious Diseases, said suggested links between the adenovirus and the hepatitis cases were “highly speculative” because the adenovirus had not been detected in the affected children’s liver tissue.
“I don’t think the evidence of the adenovirus connection is very strong," he said. "It’s the same with legacy Covid. Nobody has demonstrated these children have virus in their liver cells."
Prof Petersen, who is editor of the International Journal of Infectious Diseases, said the cases could, however, have some link to Covid-19, with the virus causing an elevated reaction by the immune system in certain people.
“I still think maybe because of a certain genetic background, Covid could prime them for autoimmune hepatitis, but at present, it’s all based on guesses,” he said.
A British scientist investigating a mysterious global hepatitis outbreak that has infected hundreds of children globally told The National recently she believes researchers are getting closer to identifying its cause.
Judith Breuer, professor of virology and director of the pathogen genomics unit at University College London, said Omicron's role is a "big question", but added "we don't have the answer".
Although many of the children have tested positive for Covid, metagenomic tests have seemed to play down an adverse reaction to Omicron as the main cause, she said.
"We haven't found Omicron in our tests as a whole, but it has certainly has been found in some children," Prof Breuer said. "We haven't found it from our metagenomics, for example. So at the moment, it remains uncertain what role it might have in the genesis of this problem".
Children receive Covid vaccinations - in pictures
Get Out
Director: Jordan Peele
Stars: Daniel Kaluuya, Allison Williams, Catherine Keener, Bradley Whitford
Four stars
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UAE currency: the story behind the money in your pockets
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'Shakuntala Devi'
Starring: Vidya Balan, Sanya Malhotra
Director: Anu Menon
Rating: Three out of five stars
Living in...
This article is part of a guide on where to live in the UAE. Our reporters will profile some of the country’s most desirable districts, provide an estimate of rental prices and introduce you to some of the residents who call each area home.
Tips to stay safe during hot weather
- Stay hydrated: Drink plenty of fluids, especially water. Avoid alcohol and caffeine, which can increase dehydration.
- Seek cool environments: Use air conditioning, fans, or visit community spaces with climate control.
- Limit outdoor activities: Avoid strenuous activity during peak heat. If outside, seek shade and wear a wide-brimmed hat.
- Dress appropriately: Wear lightweight, loose and light-coloured clothing to facilitate heat loss.
- Check on vulnerable people: Regularly check in on elderly neighbours, young children and those with health conditions.
- Home adaptations: Use blinds or curtains to block sunlight, avoid using ovens or stoves, and ventilate living spaces during cooler hours.
- Recognise heat illness: Learn the signs of heat exhaustion and heat stroke (dizziness, confusion, rapid pulse, nausea), and seek medical attention if symptoms occur.
Engine: 3.5-litre V6
Transmission: eight-speed automatic
Power: 290hp
Torque: 340Nm
Price: Dh155,800
On sale: now
Temple numbers
Expected completion: 2022
Height: 24 meters
Ground floor banquet hall: 370 square metres to accommodate about 750 people
Ground floor multipurpose hall: 92 square metres for up to 200 people
First floor main Prayer Hall: 465 square metres to hold 1,500 people at a time
First floor terrace areas: 2,30 square metres
Temple will be spread over 6,900 square metres
Structure includes two basements, ground and first floor
THE BIO: Mohammed Ashiq Ali
Proudest achievement: “I came to a new country and started this shop”
Favourite TV programme: the news
Favourite place in Dubai: Al Fahidi. “They started the metro in 2009 and I didn’t take it yet.”
Family: six sons in Dubai and a daughter in Faisalabad
Global Fungi Facts
• Scientists estimate there could be as many as 3 million fungal species globally
• Only about 160,000 have been officially described leaving around 90% undiscovered
• Fungi account for roughly 90% of Earth's unknown biodiversity
• Forest fungi help tackle climate change, absorbing up to 36% of global fossil fuel emissions annually and storing around 5 billion tonnes of carbon in the planet's topsoil
UK-EU trade at a glance
EU fishing vessels guaranteed access to UK waters for 12 years
Co-operation on security initiatives and procurement of defence products
Youth experience scheme to work, study or volunteer in UK and EU countries
Smoother border management with use of e-gates
Cutting red tape on import and export of food
Company%20Profile
%3Cp%3E%3Cstrong%3EName%3A%20%3C%2Fstrong%3EDirect%20Debit%20System%3Cbr%3E%3Cstrong%3EStarted%3A%3C%2Fstrong%3E%20Sept%202017%3Cbr%3E%3Cstrong%3EBased%3A%3C%2Fstrong%3E%20UAE%20with%20a%20subsidiary%20in%20the%20UK%3Cbr%3E%3Cstrong%3EIndustry%3A%3C%2Fstrong%3E%20FinTech%3Cbr%3E%3Cstrong%3EFunding%3A%3C%2Fstrong%3E%20Undisclosed%3Cbr%3E%3Cstrong%3EInvestors%3A%3C%2Fstrong%3E%20Elaine%20Jones%3Cbr%3E%3Cstrong%3ENumber%20of%20employees%3A%3C%2Fstrong%3E%208%3Cbr%3E%3C%2Fp%3E%0A
Other workplace saving schemes
- The UAE government announced a retirement savings plan for private and free zone sector employees in 2023.
- Dubai’s savings retirement scheme for foreign employees working in the emirate’s government and public sector came into effect in 2022.
- National Bonds unveiled a Golden Pension Scheme in 2022 to help private-sector foreign employees with their financial planning.
- In April 2021, Hayah Insurance unveiled a workplace savings plan to help UAE employees save for their retirement.
- Lunate, an Abu Dhabi-based investment manager, has launched a fund that will allow UAE private companies to offer employees investment returns on end-of-service benefits.
Fund-raising tips for start-ups
Develop an innovative business concept
Have the ability to differentiate yourself from competitors
Put in place a business continuity plan after Covid-19
Prepare for the worst-case scenario (further lockdowns, long wait for a vaccine, etc.)
Have enough cash to stay afloat for the next 12 to 18 months
Be creative and innovative to reduce expenses
Be prepared to use Covid-19 as an opportunity for your business
* Tips from Jassim Al Marzooqi and Walid Hanna
About Housecall
Date started: July 2020
Founders: Omar and Humaid Alzaabi
Based: Abu Dhabi
Sector: HealthTech
# of staff: 10
Funding to date: Self-funded
Brief scores:
England: 290 & 346
Sri Lanka: 336 & 243
The specs
Engine: 2.0-litre 4-cyl turbo
Power: 201hp at 5,200rpm
Torque: 320Nm at 1,750-4,000rpm
Transmission: 6-speed auto
Fuel consumption: 8.7L/100km
Price: Dh133,900
On sale: now
Company profile
Company: Eighty6
Date started: October 2021
Founders: Abdul Kader Saadi and Anwar Nusseibeh
Based: Dubai, UAE
Sector: Hospitality
Size: 25 employees
Funding stage: Pre-series A
Investment: $1 million
Investors: Seed funding, angel investors
Company%20profile
%3Cp%3E%3Cstrong%3ECompany%20name%3A%20%3C%2Fstrong%3EHakbah%0D%3Cbr%3E%3Cstrong%3EStarted%3A%20%3C%2Fstrong%3E2018%0D%3Cbr%3E%3Cstrong%3EFounder%3A%20%3C%2Fstrong%3ENaif%20AbuSaida%0D%3Cbr%3E%3Cstrong%3EBased%3A%20%3C%2Fstrong%3ESaudi%20Arabia%0D%3Cbr%3E%3Cstrong%3ESector%3A%20%3C%2Fstrong%3EFinTech%0D%3Cbr%3E%3Cstrong%3ECurrent%20number%20of%20staff%3A%20%3C%2Fstrong%3E22%20%0D%3Cbr%3E%3Cstrong%3EInitial%20investment%3A%20%3C%2Fstrong%3E%24200%2C000%0D%3Cbr%3E%3Cstrong%3EInvestment%20stage%3A%20%3C%2Fstrong%3Epre-Series%20A%0D%3Cbr%3E%3Cstrong%3EInvestors%3A%20%3C%2Fstrong%3EGlobal%20Ventures%20and%20Aditum%20Investment%20Management%0D%3Cbr%3E%3Cbr%3E%3C%2Fp%3E%0A
Slow loris biog
From: Lonely Loris is a Sunda slow loris, one of nine species of the animal native to Indonesia, Malaysia, Thailand and Singapore
Status: Critically endangered, and listed as vulnerable on the International Union for Conservation of Nature red list due to growing demand in the global exotic pet trade. It is one of the most popular primate species found at Indonesian pet markets
Likes: Sleeping, which they do for up to 18 hours a day. When they are awake, they like to eat fruit, insects, small birds and reptiles and some types of vegetation
Dislikes: Sunlight. Being a nocturnal animal, the slow loris wakes around sunset and is active throughout the night
Superpowers: His dangerous elbows. The slow loris’s doe eyes may make it look cute, but it is also deadly. The only known venomous primate, it hisses and clasps its paws and can produce a venom from its elbow that can cause anaphylactic shock and even death in humans
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%3Cp%3E-%20Congress%20is%20one%20of%20three%20branches%20of%20the%20US%20government%2C%20and%20the%20one%20that%20creates%20the%20nation's%20federal%20laws%3C%2Fp%3E%0A%3Cp%3E-%20Congress%20is%20divided%20into%20two%20chambers%3A%20The%20House%20of%20Representatives%20and%20the%20Senate%3C%2Fp%3E%0A%3Cp%3E-%C2%A0The%20House%20is%20made%20up%20of%20435%20members%20based%20on%20a%20state's%20population.%20House%20members%20are%20up%20for%20election%20every%20two%20years%3C%2Fp%3E%0A%3Cp%3E-%20A%20bill%20must%20be%20approved%20by%20both%20the%20House%20and%20Senate%20before%20it%20goes%20to%20the%20president's%20desk%20for%20signature%3C%2Fp%3E%0A%3Cp%3E-%20A%20political%20party%20needs%20218%20seats%20to%20be%20in%20control%20of%20the%20House%20of%20Representatives%3C%2Fp%3E%0A%3Cp%3E-%20The%20Senate%20is%20comprised%20of%20100%20members%2C%20with%20each%20state%20receiving%20two%20senators.%20Senate%20members%20serve%20six-year%20terms%3C%2Fp%3E%0A%3Cp%3E-%20A%20political%20party%20needs%2051%20seats%20to%20control%20the%20Senate.%20In%20the%20case%20of%20a%2050-50%20tie%2C%20the%20party%20of%20the%20president%20controls%20the%20Senate%3C%2Fp%3E%0A
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Founders: Ines Mena, Claudia Ribas, Simona Agolini, Nourhan Hassan and Therese Hundt
Date started: January 2017, app launched November 2017
Based: Dubai, UAE
Sector: Private/Retail/Leisure
Number of Employees: 18 employees, including full-time and flexible workers
Funding stage and size: Seed round completed Q4 2019 - $1m raised
Funders: Oman Technology Fund, 500 Startups, Vision Ventures, Seedstars, Mindshift Capital, Delta Partners Ventures, with support from the OQAL Angel Investor Network and UAE Business Angels
How to donate
Send “thenational” to the following numbers or call the hotline on: 0502955999
2289 – Dh10
2252 – Dh 50
6025 – Dh20
6027 – Dh 100
6026 – Dh 200
The%20specs
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The specs
Engine: 4.0-litre, twin-turbocharged V8
Transmission: nine-speed automatic
Power: 630bhp
Torque: 900Nm
Price: Dh810,000
Getting%20there%20and%20where%20to%20stay
%3Cp%3EFly%20with%20Etihad%20Airways%20from%20Abu%20Dhabi%20to%20New%20York%E2%80%99s%20JFK.%20There's%2011%20flights%20a%20week%20and%20economy%20fares%20start%20at%20around%20Dh5%2C000.%3Cbr%3EStay%20at%20The%20Mark%20Hotel%20on%20the%20city%E2%80%99s%20Upper%20East%20Side.%20Overnight%20stays%20start%20from%20%241395%20per%20night.%3Cbr%3EVisit%20NYC%20Go%2C%20the%20official%20destination%20resource%20for%20New%20York%20City%20for%20all%20the%20latest%20events%2C%20activites%20and%20openings.%3Cbr%3E%3C%2Fp%3E%0A
The Little Things
Directed by: John Lee Hancock
Starring: Denzel Washington, Rami Malek, Jared Leto
Four stars
MATCH INFO
France 3
Umtiti (8'), Griezmann (29' pen), Dembele (63')
Italy 1
Bonucci (36')
UJDA CHAMAN
Produced: Panorama Studios International
Directed: Abhishek Pathak
Cast: Sunny Singh, Maanvi Gagroo, Grusha Kapoor, Saurabh Shukla
Rating: 3.5 /5 stars
Singham Again
Director: Rohit Shetty
Stars: Ajay Devgn, Kareena Kapoor Khan, Ranveer Singh, Akshay Kumar, Tiger Shroff, Deepika Padukone
Rating: 3/5
If you go
The flights
Etihad (etihad.com) flies from Abu Dhabi to Luang Prabang via Bangkok, with a return flight from Chiang Rai via Bangkok for about Dh3,000, including taxes. Emirates and Thai Airways cover the same route, also via Bangkok in both directions, from about Dh2,700.
The cruise
The Gypsy by Mekong Kingdoms has two cruising options: a three-night, four-day trip upstream cruise or a two-night, three-day downstream journey, from US$5,940 (Dh21,814), including meals, selected drinks, excursions and transfers.
The hotels
Accommodation is available in Luang Prabang at the Avani, from $290 (Dh1,065) per night, and at Anantara Golden Triangle Elephant Camp and Resort from $1,080 (Dh3,967) per night, including meals, an activity and transfers.
The Gentlemen
Director: Guy Ritchie
Stars: Colin Farrell, Hugh Grant
Three out of five stars
RESULT
Al Hilal 4 Persepolis 0
Khribin (31', 54', 89'), Al Shahrani 40'
Red card: Otayf (Al Hilal, 49')
MATCH INFO
Uefa Champions League semi-final, second leg result:
Ajax 2-3 Tottenham
Tottenham advance on away goals rule after tie ends 3-3 on aggregate
Final: June 1, Madrid