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American global healthcare company, Viatris, has launched a new rapid self-test for qualitative detection of antibodies developed after Covid-19 vaccinations. The firm is going to market the Covid-19 Neutralising IgG Serological self-test, manufactured by PRIMA Lab SA, in the UK market, which would check presence of neutralising antibodies after vaccination. The presence of antibodies indicates that a person has had an immune response to the Covid-19 vaccine, and not that protective immunity has been acquired. The self-test that can be performed easily at home with a small blood sample, delivers results in just 10 minutes and has a recommended retail price of sub £20. After two doses of the Covid-19 vaccine, the self-test has shown a seroconversion rate of 98.3 per cent for the Pfizer vaccine, 98.5 per cent for the AstraZeneca vaccine and 95.2 per cent for the Moderna vaccine. It recommended that the test be performed at least 14 days after completing the vaccination cycle.

The UK's Health Security Agency (UKHSA) said mistakes at a testing laboratory led to misreporting of tens of thousands of positive COVID-19 cases as negative and may have resulted in the deaths of about 20 people. Britain has one of the highest coronavirus death tolls in the world, with more than 177,000 deaths since the pandemic started in 2020. Many experts have said the contact tracing programme fell well short of the "world-beating" system the government had promised. An investigation by the government agency responsible for responding to public health emergencies said the Immensa laboratory in central England was found to have misreported around 39,000 tests as negative when they should have been positive between September 2 and October 12 last year.

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.