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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.

Covid-19 vaccine makers are shifting gears and planning for a smaller, more competitive booster shot market after delivering as many doses as fast as they could over the last 18 months. Executives at the biggest Covid vaccine makers including Pfizer and Moderna said they believe most people who wanted to get vaccinated against Covid have already done so - more than five billion people worldwide. In the coming year, most Covid vaccinations will be booster shots, or first inoculations for children, which are still gaining regulatory approvals around the world, they said. Pfizer, which makes its shot with Germany's BioNTech and Moderna still see a major role for themselves in the vaccine market even as overall demand declines. Upstart US vaccine maker Novavax and Germany's CureVac, which is working with GlaxoSmithKline, are developing vaccines they hope to target at the booster market. The roles of AstraZeneca and Johnson & Johnson, whose shots have been less popular or effective, are expected to decline in this market.

Covid-19 vaccines made by Pfizer and Moderna that use mRNA technology provide the biggest boost to antibody levels when given 10-12 weeks after the second dose, a new study has found. The "COV-Boost" study was cited by UK officials when they announced that Pfizer and Moderna were preferred for use in the country's booster campaign, but the data has only been made publicly available now. The study found that six out of the seven boosters examined enhanced immunity after initial vaccination with Pfizer-BioNTech's vaccine, while all seven increased immunity when given after two doses of AstraZeneca's vaccine. "A third dose will be effective for many of the vaccines we've tested and in many different combinations," Professor Saul Faust, an immunologist at the University of Southampton and the trial's lead, told the media.

NHS chief executive Amanda Pritchard joined over 17 million people in England by taking her Covid-19 booster dose on Monday (December 6) whilst encouraging people to take their top-up jab. The NHS boss got a dose in each arm as she also received her flu vaccine from pharmacist Bhaveen Patel at the Junction Pharmacy in Brixton. Pritchard later posted a video on Twitter, thanking the team in the south London community pharmacy. Ahead of the first anniversary of the NHS delivering the first Covid-19 vaccine in the world on Wednesday (December 8), Pritchard thanked the "incredible efforts" of NHS staff and volunteers who worked hard to protect millions of people. Almost 100 million jabs have been delivered in England since December 8, 2020, including over 17 million booster vaccines. Expressing her delight after taking the booster dose, Pritchard said: "The booster jab was quick, easy and I now have extra protection against the virus."

Health authorities in India have said that Biological E's Covid-19 vaccine Corbevax can be administered as a booster dose in people who have taken the country's other two main shots, Covaxin and AstraZeneca's Covishield, from Friday (Aug 12). Corbevax will be available to over 18s as precautionary booster six months after a second dose, the health ministry said in an August 8 letter to state authorities. Covishield is produced for the Indian market by the Serum Institute of India under licence from AstraZeneca, while Bharat Biotech makes Covaxin. India has so far administered more than 2 billion Covid vaccine shots, including 113 million boosters, all of which have so far been of the same vaccine as the recipient's first two doses. The government says about 89 per cent of Indians above the age of 12 have had two doses.

As the government today (November 15) announced plans to expand Britain's booster programme for Covid-19 vaccinations to cover all adults aged over 40, NHS Confederation welcomed the move. The announcement follows the Joint Committee on Vaccination and Immunisation (JCVI) statement that all healthy adults aged 40-49 should be offered a booster, six months after their second dose, and that 16 and 17 year olds should be invited to have a second dose. Accepting the JCVI's advice, health and social care secretary Sajid Javid said: "All 4 parts of the UK intend to follow the JCVI's advice. "We know immunity to Covid-19 begins to wane after 6 months and new data published today shows a third dose boosts protection against symptomatic infection to more than 90% - this highlights just how important it is that everyone eligible gets their top-up jabs as soon as possible."

Britain will offer a Covid-19 booster shot to all adults and could halve the dose interval for booster jabs from six to three months in a bid to accelerate its vaccination programme amid concern over the new Omicron coronavirus variant, as number of new cases found in the country rise. The move, backed by a scientific advisory body and Health Secretary Sajid Javid, comes as ministers scramble to react swiftly to the new variant, which was first detected in South Africa. Prime minister Boris Johnson has responded to the emergence of Omicron by making mask-wearing compulsory in shops and on public transport in England. Until now, only adults in the UK aged 40 and above were eligible for a booster dose six months after their last. But that timeframe will now be halved to three months, alongside the programme's expansion to all over-18s, with priority given to older people. "These measures will protect more people, more quickly and make us better protected as a nation," Javid told MPs.

A new study has revealed that the risk of death from COVID-19 decreases significantly after vaccination, but this protection diminishes after six months, providing evidence for continued booster doses. Researchers from the UK Health Security Agency (UKHSA), who analysed more than 10 million cases of COVID-19 in adults in England between May 2020 and February 2022, found a clear association between vaccination and reduced mortality. But they also highlighted a crucial timeframe - within six months of the last vaccine dose - when Case Fatality Risk (CFR) - the proportion of cases that resulted in death - was consistently at its lowest across all age groups. After this, the protective benefit of the vaccine began to wane and CFR increased.

Even as the UK agrees deals for 14 million additional vaccine doses from Moderna and Pfizer, the Royal Pharmaceutical Society has renewed its calls for community pharmacies in England to play an increased role in delivering booster jabs for Covid-19. "Pharmacists and pharmacy teams across the health service in England have been crucial to the success of the flu and Covids-19 vaccination programmes from the outset," said Thorrun Govind, chair of the RPS in England, who has been making a case on national television for an increased role of the profession. She added: "They continue to go above and beyond to support patient care, engaging with local communities and helping to overcome vaccine hesitancy. "They've already done so much this year to look after patients in really difficult circumstances, but many will be ready to rise to the challenge of this new national effort."

Existing Covid-19 inoculations will struggle against the fast-spreading Omicron variant, the head of vaccine manufacturer Moderna warned on Tuesday (November 30), as countries ramp up vaccination programmes and impose further restrictions in an effort to curb growing concern. First reported to the World Health Organization in South Africa less than a week ago, the new strain has rapidly spread from Africa to the Pacific, and from Europe to North America as dozens of countries have announced travel restrictions. While no deaths have yet been reported from Omicron, and it could take weeks to know how infectious and how resistant the strain may prove to vaccines, its emergence underscores how besieged the world remains by Covid-19, nearly two years after the first cases were recorded. Stephane Bancel, the head of US vaccine manufacturer Moderna, told the Financial Times in an interview published today that data would be available on the effectiveness of vaccines in the two weeks' time, but that scientists were pessimistic.