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Pfizer and its German partner, BioNTech, fired back at Moderna on Monday in a patent lawsuit over their rival Covid-19 vaccines, seeking dismissal of the lawsuit in Boston federal court and an order that Moderna's patents are invalid and not infringed. Moderna first sued Pfizer in August, accusing the company of violating its rights in three patents related to innovations that Cambridge, Massachusetts-based Moderna said it pioneered before the Covid-19 pandemic. Moderna has also filed a related lawsuit against Pfizer and BioNTech in Germany. All three companies are also embroiled in US patent disputes with other companies over the vaccines. A Pfizer spokesperson said the company and BioNTech are confident in their intellectual property and will "vigorously defend" against Moderna's claims. Moderna did not immediately respond to a request for comment on the Monday filing.

The Medicines and Healthcare products Regulatory Agency (MHRA) has approved a second "bivalent" vaccine as a Covid-19 booster. The updated booster vaccine made by Pfizer/BioNTech, targeting two coronavirus variants, has been approved for use in individuals aged 12 years and above. In each dose of the booster vaccine, 'Comirnaty bivalent Original/Omicron', half of the vaccine (15 micrograms) targets the original virus strain and the other half (15 micrograms) targets Omicron (BA.1). Dr June Raine, MHRA chief executive said: "I am pleased to announce that we now have a second approved vaccine for the UK Autumn booster programme. The clinical trial of the Pfizer/BioNTech bivalent vaccine showed a strong immune response against the Omicron BA.1 variant as well as the original strain. Bivalent vaccines are helping us to meet the challenge of an ever-evolving virus, to help protect people against Covid-19 variants. We have in place a comprehensive safety surveillance strategy for all UK-approved Covid-19 vaccines, and this will include the updated booster we approved today."

BioNTech and Pfizer are to start tests on humans of next-generation vaccines that protect against a wide variety of coronaviruses in the second half of the year. Their experimental work on shots that go beyond the current approach include T-cell-enhancing shots, designed to primarily protect against severe disease if the virus becomes more dangerous, and pan-coronavirus shots that protect against the broader family of viruses and its mutations. In presentation slides posted on BioNTech's website for its investor day, the German biotech firm said its aim was to "provide durable variant protection". The two companies are currently discussing with regulators enhanced versions of their established shot to better protect against the Omicron variant and its sublineages. The virus' persistent mutation into new variants that more easily evade vaccine protection, as well as waning human immune memory, have added urgency to the search by companies, governments and health bodies for more reliable tools of protection. As part of a push to further boost its infectious disease business, BioNTech said it was independently working on precision antibiotics that kill superbugs that have grown resistant to currently available anti-infectives.

Clinical trials for BioNTech's cancer vaccines should start this year in Britain, marking an important step towards their possible sale on the open market, the German company's top executive Ugur Sahin told magazine Der Spiegel. BioNTech, known for its COVID vaccine with U.S. partner Pfizer, is currently deciding which types of cancer it wants to test its personalized cancer immunotherapies on and the locations where it will conduct the trials, Sahin said. The company wants these therapies, which are based on messenger RNA (mRNA) technology similar to the one that underpins its COVID-19 vaccine, to soon become a regular treatment for cancer patients. "We believe that this should be possible for large amounts of patients before 2030," Sahin said.

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.

The Medicines and Healthcare products Regulatory Agency (MHRA) on Tuesday authorised a Covid-19 vaccine for infants as young as six months, opening the door for vaccinating the country's youngest children once the UK's Joint Committee on Vaccination and Immunisation (JCVI) agrees. The regulator authorised the vaccine - made by Pfizer and BioNTech - for children aged six months to four years old, after it was deemed safe and effective based on an ongoing clinical trial involving 4,526 participants. Whether the vaccine is eventually deployed in this age group depends on a recommendation from the JCVI, which advises UK health departments on which shots should be used as part of the national vaccination programme. The vaccine is tailored for use in this age group - it is a lower dose version than the one used in children aged five to 11 years. It is given as three injections in the upper arm, with the first two doses given three weeks apart, followed by a third dose administered at least two months after the second dose.

French drugmaker Sanofi said on Monday (June 13) an upgraded version of the Covid-19 vaccine candidate it is developing with GSK showed potential in two trials to protect against the virus's main variants of concern, including the Omicron BA.1 and BA.2 strains, when used as a booster shot. While the two companies' first experimental Covid shot is undergoing review by the European Medicines Agency, Sanofi and GSK have continued work on a vaccine that is moulded on the now-supplanted Beta variant, hoping still that it will confer broad protection against future viral mutations. Sanofi said this new vaccine candidate was shown to significantly boost antibody levels against a number of variants of concern, when given to trial participants who had an initial course of mRNA vaccines, a type made by BioNTech-Pfizer and Moderna. In a separate trial conducted by a French hospitals network, Sanofi's Beta-adapted booster shot triggered a higher immune response than Sanofi's first-generation shot or Pfizer-BioNTech's established vaccine in previously vaccinated volunteers.

For the first time, Covid-19 vaccines will be available for purchase from pharmacies in Britain from April 1. As revealed by The Times, Boots is set to launch a private vaccination service next week to ensure that people "remain ready to respond to this constantly evolving and unpredictable virus." Under the NHS national immunization programme (NIP), Covid booster vaccines are only offered to those at high risk, including over-65s or patients with weakened immune systems. From April 1, anyone aged 12 or over can get the Pfizer-BioNTech Covid-19 vaccine at 50 Boots stores for £98.95. While it's highly unlikely for healthier young adults to experience severe Covid-19, getting the single-dose vaccine can protect them from discomforting symptoms like coughs and sore throats. A spokesperson for Boots told the publication that their private service is the extension of their existing delivery of Covid-19 vaccinations for the NHS.