Covid antibodies remain strong up to nine months after infection, regardless of whether a person had symptoms, a new study has found.
Almost an entire Italian town was tested by researchers from the University of Padua and Imperial College London to check how long antibodies last.
More than 85 per cent of the 3,000 residents of Vo', Italy, in February and March 2020 were tested for Ovid-19 infection, then tested again in May and November 2020 for antibodies against the virus.
The team found that 98.8 per cent of infected people showed detectable levels of antibodies up to nine months later. There was no difference between people who had suffered Covid symptoms and those who were symptom-free. The results were published on Monday in Nature Communications.
Previous studies suggested immunity lasts around six months, meaning it is possible to catch Covid twice. Being vaccinated reduces the likelihood of infection and douses symptoms but does not necessarily prevent falling ill.
The researchers previously found that mass testing and quarantining in Vo’ – which experienced the first known Covid-19 death in Italy – enabled the community to suppress the virus in only a few weeks. The town went into quarantine immediately after the death on February 21, 2020 and locking down the area and implementing a test and trace system “substantially reduced transmission”.
In the latest study the team found cases of antibody levels increasing in some people, suggesting potential reinfection with the virus, providing a boost to the immune system.
"We found no evidence that antibody levels between symptomatic and asymptomatic infections differ significantly, suggesting that the strength of the immune response does not depend on the symptoms and the severity of the infection," lead author Dr Ilaria Dorigatti, of Imperial College said.
"However, our study does show that antibody levels vary, sometimes markedly, depending on the test used. This means that caution is needed when comparing estimates of infection levels in a population obtained in different parts of the world with different tests and at different times."
Prof Enrico Lavezzo, from the University of Padua, said: "The May testing demonstrated that 3.5 per cent of the Vo' population had been exposed to the virus, even though not all of these subjects were aware of their exposure given the large fraction of asymptomatic infections.
"However, at the follow-up, which was performed roughly nine months after the outbreak, we found that antibodies were less abundant, so we need to continue to monitor antibody persistence for longer time spans."
The team found that there was a 25 per cent probability that a person would pass the infection to a family member and that most transmission (79 per cent) was caused by 20 per cent of infections.
The large differences in how one infected person may infect others suggests that behavioural factors are vital for epidemic control and physical distancing, as well as limiting the number of social contacts and mask-wearing, continue to be important to reduce the risk of transmitting the disease, even in highly vaccinated populations.
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.
THE APPRENTICE
Director: Ali Abbasi
Starring: Sebastian Stan, Maria Bakalova, Jeremy Strong
Rating: 3/5
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.
The Pope's itinerary
Sunday, February 3, 2019 - Rome to Abu Dhabi
1pm: departure by plane from Rome / Fiumicino to Abu Dhabi
10pm: arrival at Abu Dhabi Presidential Airport
Monday, February 4
12pm: welcome ceremony at the main entrance of the Presidential Palace
12.20pm: visit Abu Dhabi Crown Prince at Presidential Palace
5pm: private meeting with Muslim Council of Elders at Sheikh Zayed Grand Mosque
6.10pm: Inter-religious in the Founder's Memorial
Tuesday, February 5 - Abu Dhabi to Rome
9.15am: private visit to undisclosed cathedral
10.30am: public mass at Zayed Sports City – with a homily by Pope Francis
12.40pm: farewell at Abu Dhabi Presidential Airport
1pm: departure by plane to Rome
5pm: arrival at the Rome / Ciampino International Airport
Specs
Engine: Electric motor generating 54.2kWh (Cooper SE and Aceman SE), 64.6kW (Countryman All4 SE)
Power: 218hp (Cooper and Aceman), 313hp (Countryman)
Torque: 330Nm (Cooper and Aceman), 494Nm (Countryman)
On sale: Now
Price: From Dh158,000 (Cooper), Dh168,000 (Aceman), Dh190,000 (Countryman)
SPECS
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More from Neighbourhood Watch:
The specs
Engine: 4.0-litre V8 twin-turbocharged and three electric motors
Power: Combined output 920hp
Torque: 730Nm at 4,000-7,000rpm
Transmission: 8-speed dual-clutch automatic
Fuel consumption: 11.2L/100km
On sale: Now, deliveries expected later in 2025
Price: expected to start at Dh1,432,000
Specs
Engine: Dual-motor all-wheel-drive electric
Range: Up to 610km
Power: 905hp
Torque: 985Nm
Price: From Dh439,000
Available: Now
The specs
Engine: 4.0-litre flat-six
Torque: 450Nm at 6,100rpm
Transmission: 7-speed PDK auto or 6-speed manual
Fuel economy, combined: 13.8L/100km
On sale: Available to order now
The biog
Born: Kuwait in 1986
Family: She is the youngest of seven siblings
Time in the UAE: 10 years
Hobbies: audiobooks and fitness: she works out every day, enjoying kickboxing and basketball
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
ACC 2019: The winners in full
Best Actress Maha Alemi, Sofia
Best Actor Mohamed Dhrif, Weldi
Best Screenplay Meryem Benm’Barek, Sofia
Best Documentary Of Fathers and Sons by Talal Derki
Best Film Yomeddine by Abu Bakr Shawky
Best Director Nadine Labaki, Capernaum
JOKE'S%20ON%20YOU
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LA LIGA FIXTURES
Friday Celta Vigo v Villarreal (midnight kick-off UAE)
Saturday Sevilla v Real Sociedad (4pm), Atletico Madrid v Athletic Bilbao (7.15pm), Granada v Barcelona (9.30pm), Osasuna v Real Madrid (midnight)
Sunday Levante v Eibar (4pm), Cadiz v Alaves (7.15pm), Elche v Getafe (9.30pm), Real Valladolid v Valencia (midnight)
Monday Huesca v Real Betis (midnight)
GAC GS8 Specs
Engine: 2.0-litre 4cyl turbo
Power: 248hp at 5,200rpm
Torque: 400Nm at 1,750-4,000rpm
Transmission: 8-speed auto
Fuel consumption: 9.1L/100km
On sale: Now
Price: From Dh149,900
EPL's youngest
- Ethan Nwaneri (Arsenal)
15 years, 181 days old
- Max Dowman (Arsenal)
15 years, 235 days old
- Jeremy Monga (Leicester)
15 years, 271 days old
- Harvey Elliott (Fulham)
16 years, 30 days old
- Matthew Briggs (Fulham)
16 years, 68 days old
The%20specs
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Results
Stage three:
1. Stefan Bissegger (SUI) EF Education-EasyPost, in 9-43
2. Filippo Ganna (ITA) Ineos Grenadiers, at 7s
3. Tom Dumoulin (NED) Jumbo-Visma, at 14s
4. Tadej Pogacar (SLO) UAE-Team Emirates, at 18s
5. Joao Almeida (POR) UAE-Team Emirates, at 22s
6. Mikkel Bjerg (DEN) UAE-Team Emirates, at 24s
General Classification:
1. Stefan Bissegger (SUI) EF Education-EasyPost, in 9-13-02
2. Filippo Ganna (ITA) Ineos Grenadiers, at 7s
3. Jasper Philipsen (BEL) Alpecin Fenix, at 12s
4. Tom Dumoulin (NED) Jumbo-Visma, at 14s
5. Tadej Pogacar (SLO) UAE-Team Emirates, at 18s
6. Joao Almeida (POR) UAE-Team Emirates, at 22s
Conflict, drought, famine
Estimates of the number of deaths caused by the famine range from 400,000 to 1 million, according to a document prepared for the UK House of Lords in 2024.
It has been claimed that the policies of the Ethiopian government, which took control after deposing Emperor Haile Selassie in a military-led revolution in 1974, contributed to the scale of the famine.
Dr Miriam Bradley, senior lecturer in humanitarian studies at the University of Manchester, has argued that, by the early 1980s, “several government policies combined to cause, rather than prevent, a famine which lasted from 1983 to 1985. Mengistu’s government imposed Stalinist-model agricultural policies involving forced collectivisation and villagisation [relocation of communities into planned villages].
The West became aware of the catastrophe through a series of BBC News reports by journalist Michael Buerk in October 1984 describing a “biblical famine” and containing graphic images of thousands of people, including children, facing starvation.
Band Aid
Bob Geldof, singer with the Irish rock group The Boomtown Rats, formed Band Aid in response to the horrific images shown in the news broadcasts.
With Midge Ure of the band Ultravox, he wrote the hit charity single Do They Know it’s Christmas in December 1984, featuring a string of high-profile musicians.
Following the single’s success, the idea to stage a rock concert evolved.
Live Aid was a series of simultaneous concerts that took place at Wembley Stadium in London, John F Kennedy Stadium in Philadelphia, the US, and at various other venues across the world.
The combined event was broadcast to an estimated worldwide audience of 1.5 billion.
Specs
Engine: Duel electric motors
Power: 659hp
Torque: 1075Nm
On sale: Available for pre-order now
Price: On request
The specs: 2018 Ducati SuperSport S
Price, base / as tested: Dh74,900 / Dh85,900
Engine: 937cc
Transmission: Six-speed gearbox
Power: 110hp @ 9,000rpm
Torque: 93Nm @ 6,500rpm
Fuel economy, combined: 5.9L / 100km
The specs
Engine: 1.5-litre turbo
Power: 181hp
Torque: 230Nm
Transmission: 6-speed automatic
Starting price: Dh79,000
On sale: Now
The specs
Engine: 2.0-litre 4-cyl turbo
Power: 247hp at 6,500rpm
Torque: 370Nm from 1,500-3,500rpm
Transmission: 10-speed auto
Fuel consumption: 7.8L/100km
Price: from Dh94,900
On sale: now
The National's picks
4.35pm: Tilal Al Khalediah
5.10pm: Continous
5.45pm: Raging Torrent
6.20pm: West Acre
7pm: Flood Zone
7.40pm: Straight No Chaser
8.15pm: Romantic Warrior
8.50pm: Calandogan
9.30pm: Forever Young
Company%20profile%20
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The National Archives, Abu Dhabi
Founded over 50 years ago, the National Archives collects valuable historical material relating to the UAE, and is the oldest and richest archive relating to the Arabian Gulf.
Much of the material can be viewed on line at the Arabian Gulf Digital Archive - https://www.agda.ae/en
THE BIO: Martin Van Almsick
Hometown: Cologne, Germany
Family: Wife Hanan Ahmed and their three children, Marrah (23), Tibijan (19), Amon (13)
Favourite dessert: Umm Ali with dark camel milk chocolate flakes
Favourite hobby: Football
Breakfast routine: a tall glass of camel milk
Palestine and Israel - live updates
Ferrari 12Cilindri specs
Engine: naturally aspirated 6.5-liter V12
Power: 819hp
Torque: 678Nm at 7,250rpm
Price: From Dh1,700,000
Available: Now
Moon Music
Artist: Coldplay
Label: Parlophone/Atlantic
Number of tracks: 10
Rating: 3/5
