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Britain's biotech firm Avacta Group on Monday (January 10) announced halting sales of its Covid-19 rapid antigen lateral flow test AffiDX to replace antibodies in the device and increase its ability to diagnose the Omicron variant. The company stated that AffiDX is capable of detecting Omicron when the virus is present in high numbers in samples, but the sensitivity of the test reduces at lower viral loads. The performance of all rapid antigen tests came under scanner in wake of a large number of mutations in the Omicron variant. AffiDX contains both a proprietary Affimer reagent and a commercially available antibody. The Affimer reagent detects the Omicron variant with the same sensitivity as the Delta variant, and performance of the antibody is paired with the Affimer reagent in the test. This has been affected by the additional Omicron mutations, the firm said. Alastair Smith, chief executive of Avacta Group, said: "Our determination to only provide high quality, high performance diagnostic tests has led us to the correct decision to pause all marketing of the AffiDX® lateral flow antigen test. We have, of course, been unable to market the product in the UK since October 2021, as the product continues to await approval under the new CTDA regulatory process.

Britain has approved Novavax's Covid-19 vaccine for use in those 18 years of age and older, the country's medicines regulator said on Thursday (February 3), bringing a fifth coronavirus shot to its roster amidst the rapid spread of the Omicron variant. The vaccine, Nuvaxovid, was approved as a first and second dose as it met the required safety, quality and effectiveness standards, the UK's Medicines and Healthcare products Regulatory Agency (MHRA) said in a statement. The British approval for Nuvaxovid comes days after the drugmaker filed for US authorisation of the vaccine following months of struggles with development and manufacturing problems, and follows a German backing earlier in the day. "We are continuing our vital safety work in monitoring the use of all Covid-19 vaccines, to ensure that their benefits in protecting people against Covid-19 disease continue to outweigh any risks," MHRA chief executive June Raine said.

It is not sustainable to give Covid-19 booster shots every three to six in the long term, Britain's chief scientific adviser said on Tuesday (January 4), even though the booster rollout is needed in the short term to combat the Omicron variant. "It would be a situation that isn't tenable to say everyone's going to need to be having another vaccine every three or six months. "That's not the long-term view of where this goes to," Patrick Vallance said at a news conference, adding that annual booster shots against Covid-19 might be necessary, similar to flu shots.

The UK Health Security Agency (UKHSA) and the Office for National Statistics (ONS) will jointly launch a new study to gather data on COVID-19 this winter. The Winter COVID-19 Infection Study (WCIS) will run from November 2023 to March 2024, involving up to 200,000 participants, UKHSA has said on Monday (October 2). UKHSA previously commissioned the Coronavirus Infection Survey (CIS), conducted by the ONS in collaboration with scientific study leaders from Oxford University, analysing more than 11.5 million swab tests and 3 million blood tests from April 2020 to March 2023. Meanwhile, the Winter CIS study involves conducting up to 32,000 lateral flow tests weekly, providing vital insights into COVID-19 prevalence in the broader community. The sample will be structured to broadly reflect key population characteristics.

The world has never been in a better position to end the Covid-19 pandemic, the head of the World Health Organization said on September 14, his most optimistic outlook yet on the years-long health crisis which has killed over six million people. "We are not there yet. But the end is in sight," WHO Director-General Tedros Adhanom Ghebreyesus told reporters at a virtual press conference. That was the most upbeat assessment from the UN agency since it declared an international emergency in January 2020 and started describing Covid-19 as a pandemic three months later. The virus, which emerged in China in late 2019, has killed nearly 6.5 million people and infected 606 million, roiling global economies and overwhelming healthcare systems. The rollout of vaccines and therapies have helped to stem deaths and hospitalisations, and the Omicron variant which emerged late last year causes less severe disease. Deaths from Covid-19 last week were the lowest since March 2020, the U.N. agency reported.

Britain has become the first country to approve a Codiv-19 vaccine that targets both the original and Omicron variant of the virus. Medicines regulator MHRA approved the so-called bivalent vaccine made by US drug company Moderna as a booster for adults. The agency's decision was based on clinical trial data that showed the booster triggered "a strong immune response" against both Omicron (BA.1) and the original 2020 virus, it said. The MHRA also cited an exploratory analysis in which the shot was also found to generate a good immune response against the currently dominant Omicron offshoots BA.4 and BA.5. "The first generation of Covid-19 vaccines being used in the UK continue to provide important protection against the disease and save lives," MHRA chief executive June Raine said in a statement. "What this bivalent vaccine gives us is a sharpened tool in our armoury to help protect us against this disease as the virus continues to evolve."

US biotech firm Moderna will build a new research and manufacturing centre in Britain to develop vaccines against new Covid-19 variants, other respiratory illnesses and help improve readiness for any future pandemics. The facility is expected to start producing shots in 2025 and Britain has made a commitment to buy Moderna's vaccines for the next decade under the agreement. Moderna's Covid-19 vaccines, which use messenger RNA (mRNA) technology, were among those deployed in Britain to tackle the crisis and enable prime minister Boris Johnson to reopen the economy from stringent lockdowns. Moderna chief executive Stephane Bancel said the priority was to develop a shot combining refreshed boosters against Covid, flu and Respiratory Syncytial Virus (RSV). "By building a plant in the UK, we are also providing the UK Government - which has a long term partnership with us, with this agreement - with the ability to be pandemic ready," Bancel said on Wednesday.

The world's first human challenge trial in which volunteers were deliberately exposed to Covid-19 to advance research into the disease was found to be safe in healthy young adults, one of the companies running the study said on Wednesday. The data supports the safety of this model which could theoretically provide a "plug and play" platform for testing therapies and vaccines using the original Covid-19 strain as well as variants of the virus, Open Orphan, which carried out the study, said in a statement. Open Orphan is running the project, launched a year ago, with Imperial College London, the UK government's vaccines task force and the clinical company  hVIVO. The trial infected 36 healthy male and female volunteers aged 18-29 years with the original SARS-CoV-2 strain of the virus and closely monitored them in a controlled quarantined setting. They will be followed up for 12 months after discharge from the quarantine facility.

There is a realistic possibility of large waves of Covid-19 infection in the future in Britain and such waves might even be considered likely, epidemiologists who model the Covid-19 pandemic to inform government advice have said. Prime minister Boris Johnson has ditched legal restrictions in England, saying that, while the pandemic was not over, Britain needs to learn to live with Covid. The Scientific Pandemic Influenza Group on Modelling, Operational sub-group (SPI-M-O) said the emergence of new viral variants was the biggest unknown factor in the medium-to-long term, along with waning population immunity and changes in mixing patterns. "Large future waves of infection that need active management to prevent detrimental pressure on the health and care sector are, at least, a realistic possibility (high confidence) or likely (medium confidence)," SPI-M-O said in a consensus statement published on Friday.

GlaxoSmithKline (GSK) says initial tests of the antibody-based Covid-19 therapy it is developing with US partner Vir suggest the drug is effective against the Omicron variant. A GSK statement on Thursday (December 2) said that lab tests and a study on hamsters have demonstrated the sotrovimab antibody cocktail to work against viruses that were bio-engineered to carry a number of hallmark mutations of the new variant. The tests are continuing to confirm the results against all of the Omicron mutations, with an update expected by the end of the year, it added. The antibody is designed to latch on to the spike protein on the surface of the coronavirus, but Omicron has been found to have an unusually high amount of mutations on that protein. "Sotrovimab was deliberately designed with a mutating virus in mind," said Vir chief executive George Scangos, adding that the drug was targeting a region of the spike protein that was highly unlikely to mutate.

A fourth dose of Covid-19 vaccine is not needed at present, as latest data shows first booster provides high levels of protection against Omicron variant among older adults, says the Joint Committee on Vaccination and Immunisation (JCVI). After analysing latest data from the UK Health Security Agency (UKHSA), JCVI said: "There is no immediate need to introduce a second booster dose, or fourth jab, to the most vulnerable". Data from UKSHA revealed that single booster dose provides around 90 per cent protection against hospitalisation to those aged 65 and over, even after three months of jab. However, protection against mild symptomatic infection is short-lived and drops to around 30 per cent by about three months. The study, which looked at booster doses in those aged over 65, showed that with two vaccine doses, protection against the infection drops to around 70 per cent after three months and to 50 per cent after six months.

Daily hospital admissions in Britain could soon hit a new high because the Omicron variant of the coronavirus is spreading so fast, piling pressure on a health service struggling with staff sickness, England's chief medical officer said on Thursday (December 16). Britain recorded on Wednesday its highest number of daily coronavirus cases since the start of the pandemic at 78,610. Omicron is so transmissible that even if it proves to be milder than other variants, it could still cause a surge in hospital admissions, Chris Whitty told lawmakers. The record for the number of people admitted to hospital with Covid-19 is 4,583 set in January. "It is possible, because this is going to be very concentrated over a short period of time, even if it's milder, you could end up with a higher number than that going into hospital on a single day," he said.

Britain on Monday (January 10) put the biggest private health companies on high alert to deliver crucial treatments such as cancer surgery should Omicron overwhelm National Health Service hospitals in England. The United Kingdom's death toll from the Covid-19 pandemic stands at 150,154, the world's seventh worst official Covid toll after the United States, Brazil, India, Russia, Mexico and Peru. Prime minister Boris Johnson has bet on refraining from lockdowns to deal with the Omicron variant which in recent weeks has swept across the UK, albeit with death rates significantly lower than previous waves. In a sign of just how stretched the NHS could become, health secretary Sajid Javid ordered England's NHS to strike a three-month deal with private health companies to allow patients to get treatments such as cancer surgery outside. "Millions of patients have already got their tests and treatment quicker thanks to our existing deal with independent providers," said David Sloman, NHS England chief operating officer and Covid incident director.

Prime minister Boris Johnson received his Covid-19 booster shot on Thursday (December 2) and urged others to follow suit to help the country fend off the Omicron variant of coronavirus. Wearing a mask, Johnson briefly chatted to staff and others queuing for their shots at the vaccination centre in central London, asking them if they were there to receive a booster dose and thanking them for attending. Johnson, who said it could "have gone either way" when he was treated in hospital for Covid last year, was later filmed rolling up his shirt sleeve and receiving his shot. "Fantastic. Thank you so much," he said to the nurse, before receiving a badge that said "I've boosted my immunity".

Health and social care workers in England, including those working in community pharmacy, will no longer have to have a Covid jab as a condition of employment from later this month, the government said on Tuesday (March 1). The government had announced on January 31 that it intended to revoke the regulations that made vaccination compulsory, subject to the results of a public consultation. The decision was taken because the Omicron strain of the virus was less severe than the Delta variant, and due to high rates of vaccination of people in the UK. Health secretary Sajid Javid told parliament in a written statement that more than 90,000 health and social care workers and members of the public responded to the consultation.

The NHS Covid-19 vaccination programme has administered more than 40 million second doses following a bumper week that saw over 200,000 people coming forward for their second jab. Last week, more than 65,000 people aged 18 and over also stepped up to get their first dose of the Covid-19 jab. The NHS continued to encourage people to come forward for their first, second or third doses. Recent data from the UK Health Security Agency (UKHSA) showed that two doses of the vaccine are not enough to avoid the Omicron infection, but a booster significantly increases protection against the variant. Since the start of vaccination programme, NHS England has administered more than 113 million jabs in total. However, more than 1.1 million people aged 18 and over have still not come forward for their second dose.

Kate Bingham, the former head of the UK's Covid-19 Vaccine Taskforce who secured millions of doses for the country, said scientists should know within a week whether existing shots are effective against the Omicron variant of the coronavirus. Bingham, a venture capitalist who backed multiple vaccines at the start of the pandemic to secure early access for Britain, said she currently expected that the leading shots would still show efficacy. "The question is do they have the same level of efficacy?" she said on Wednesday. Bingham, who has returned to her role as managing partner at SV Health Investors, said Britain had built up the capability to quickly test existing vaccines against new variants. "It's not something you can do overnight, but we will get data, I would have thought within a week as to whether or not the vaccines work or don't," she said.

The minimum Covid-19 self-isolation period in England will be cut to five days from seven if someone tests negative twice, health secretary Sajid Javid said on Thursday (January 13) - a move that could reduce staffing disruption in businesses and infrastructure. The rapid spread of the Omicron variant has fuelled a spike in Covid-19 cases to record highs in Britain, and the surge has cause major disruption to the staffing of hospitals, schools and transport as staff have to self-isolate. "We've made the decision to reduce the minimum self-isolation period to five full days in England," Javid told parliament. "From Monday, people can test twice before they go, leaving isolation at the start of day six." The government had previously reduced isolation period to seven days from 10 days to people in England who get a negative result on a rapid lateral flow test two days in a row.

England is set to reopen temporary field hospitals to contain a possible overspill of inpatients due to a surge in coronavirus cases, the national health service said Thursday. Fuelled by the highly contagious Omicron variant, daily cases have ballooned, standing at more than 183,000 on Wednesday. NHS England said it would start building the structures in the grounds of eight hospitals in cities including London, Bristol and Leeds from this week, with each designed to house around 100 extra patients. "Given the high level of Covid-19 infections and increasing hospital admissions, the NHS is now on a war footing," National medical director Stephen Powis said. The extra beds are designed for patients who are recovering from illnesses, including those who no longer have Covid, to free up space and staff to treat large numbers of virus cases.

A news report suggests the Department of Health and Social Care is aiming to be ready to start charging for Covid-19 tests which are currently free at the end of June. Britain has been increasingly dependent on rapid testing to try to tackle the more-transmissible Omicron variant, which has spread rapidly through the population but is less severe. The government has previously said it will end the universal free provision of easy-to-use lateral flow devices (LFDs) at a "later stage", with individuals and businesses bearing the cost. The Department of Health has declined to say what the tests cost, citing commercial contracts. One source has told the Reuters news agency they can run to £30 for a pack of seven. Free pick up from pharmacies The tests have been made freely available to order online or pick up from local pharmacies since April. The UK Health Security Agency said that between December 30 and January 5 more than 8 million LFDs were conducted, the highest weekly figure on record.