Double vaccinated people can easily spread the Delta variant of Covid-19 in their households, a British study has shown.
Unvaccinated people were most at risk of transmission, the Imperial College London study found. Contacts were less likely to get infected if they had been vaccinated.
The study illustrates how the highly transmissible Delta variant can spread even in a vaccinated population.
Peak viral load among vaccinated people is similar to that seen in unvaccinated people, which may explain why they can still readily pass on the virus, according to the study published in The Lancet Infectious Diseases.
Researchers say unvaccinated people should get their shot as soon as possible, with people now more likely to spend time indoors due to the winter months.
Vaccines remain highly effective at preventing severe disease and deaths from Covid-19 but studies suggest they may be less effective against the Delta variant.
The researchers underlined that did not weaken the argument for vaccination as the best way of reducing serious illness from Covid-19 and said booster shots were required.
“By carrying out repeated and frequent sampling from contacts of Covid-19 cases, we found that vaccinated people can contract and pass on infection within households, including to vaccinated household members,” Dr Anika Singanayagam, co-lead author of the study, said.
“Our findings provide important insights into ... why the Delta variant is continuing to cause high Covid-19 case numbers around the world, even in countries with high vaccination rates.”
“The ongoing transmission we are seeing between vaccinated people makes it essential for unvaccinated people to get vaccinated to protect themselves from acquiring infection and severe Covid-19, especially as more people will be spending time inside in close proximity during the winter months,” Dr Singanayagam said.
The study, which enrolled 621 participants, found that of 205 household contacts of people with Delta per cent Covid-19 infection, 38 of household contacts who were unvaccinated went on to test positive, compared to 25 per cent of vaccinated contacts.
Vaccinated contacts who tested positive for Covid-19 on average had received their shots longer ago than those who tested negative, which the authors said was evidence of waning immunity and supported the need for booster shots.
Imperial College London epidemiologist Neil Ferguson said that the transmissibility of Delta meant that it was unlikely Britain would reach “herd immunity” for long.
“That may happen in the next few weeks: if the epidemic's current transmission peaks and then starts declining, we have by definition in some sense reached herd immunity, but it is not going to be a permanent thing,” he told reporters.
“Immunity wanes over time, it is imperfect, so you still get transmission happening, and that is why the booster programme is so important.”
Racecard
6.35pm: American Business Council – Maiden (PA) Dh80,000 (Dirt) 1,600m
7.10pm: British Business Group – Maiden (TB) Dh82,500 (D) 1,200m
7.45pm: CCI France UAE – Handicap (TB) Dh87,500 (D) 1,400m
8.20pm: Czech Business Council – Rated Conditions (TB) Dh105,000 (D) 1,400m
8.55pm: Netherlands Business Council – Rated Conditions (TB) Dh95,000 (D) 1,600m
9.30pm: Indian Business and Professional Council – Handicap (TB) Dh95,000 (D) 1,200m
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
Labour dispute
The insured employee may still file an ILOE claim even if a labour dispute is ongoing post termination, but the insurer may suspend or reject payment, until the courts resolve the dispute, especially if the reason for termination is contested. The outcome of the labour court proceedings can directly affect eligibility.
- Abdullah Ishnaneh, Partner, BSA Law
The National in Davos
We are bringing you the inside story from the World Economic Forum's Annual Meeting in Davos, a gathering of hundreds of world leaders, top executives and billionaires.
Company Profile
Company name: Yeepeey
Started: Soft launch in November, 2020
Founders: Sagar Chandiramani, Jatin Sharma and Monish Chandiramani
Based: Dubai
Industry: E-grocery
Initial investment: $150,000
Future plan: Raise $1.5m and enter Saudi Arabia next year
The bio
Studied up to grade 12 in Vatanappally, a village in India’s southern Thrissur district
Was a middle distance state athletics champion in school
Enjoys driving to Fujairah and Ras Al Khaimah with family
His dream is to continue working as a social worker and help people
Has seven diaries in which he has jotted down notes about his work and money he earned
Keeps the diaries in his car to remember his journey in the Emirates
Tearful appearance
Chancellor Rachel Reeves set markets on edge as she appeared visibly distraught in parliament on Wednesday.
Legislative setbacks for the government have blown a new hole in the budgetary calculations at a time when the deficit is stubbornly large and the economy is struggling to grow.
She appeared with Keir Starmer on Thursday and the pair embraced, but he had failed to give her his backing as she cried a day earlier.
A spokesman said her upset demeanour was due to a personal matter.
UPI facts
More than 2.2 million Indian tourists arrived in UAE in 2023
More than 3.5 million Indians reside in UAE
Indian tourists can make purchases in UAE using rupee accounts in India through QR-code-based UPI real-time payment systems
Indian residents in UAE can use their non-resident NRO and NRE accounts held in Indian banks linked to a UAE mobile number for UPI transactions
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How Islam's view of posthumous transplant surgery changed
Transplants from the deceased have been carried out in hospitals across the globe for decades, but in some countries in the Middle East, including the UAE, the practise was banned until relatively recently.
Opinion has been divided as to whether organ donations from a deceased person is permissible in Islam.
The body is viewed as sacred, during and after death, thus prohibiting cremation and tattoos.
One school of thought viewed the removal of organs after death as equally impermissible.
That view has largely changed, and among scholars and indeed many in society, to be seen as permissible to save another life.
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match info
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