Today’s covid-19 news: · Hospitals in England declare critical incidents due to staff shortages · Infection rates ‘may have plateaued’ in London, says epidemiologist · US schools delay classes or switch to remote learning
is about the new science of contagion and the surprising ways it shapes our lives and behaviour. The author, Adam Kucharski, is an epidemiologist at the London School of Hygiene and Tropical Medicine, UK, and in the book he examines how diseases spread and why they stop.Finnbarr Webster/Getty ImagesImmunity offered by vaccines wanes more quickly with omicron, finds UK study
The protection conferred by booster vaccines against the omicron variant begins to wane within 10 weeks, according to aBased on an analysis of 147,597 delta and 68,489 omicron cases, the agency found that the Oxford/AstraZeneca, Pfizer/BioNTech and Moderna vaccines are less effective against omicron than delta.
The UKHSA report also estimates that someone infected with omicron is 50 to 70 per cent less likely to be admitted to hospital, compared with delta. This is based on a preliminary analysis of 114,144 omicron cases and 461,772 delta cases occurring between 22 November and 19 December. The difference is somewhat larger than suggested bypublished by Imperial College London on Wednesday, which reported a 15 to 20 per cent lower risk.
However, modelling suggests that the severity of omicron would need to be around 90 per cent lower to avoid similar levels of hospital admissions to previous waves, according to“What we have got now is a really fine balance between something that looks like a lower risk of hospitalisation – which is great news – but equally a highly transmissible variant and one that we know evades some of our immune defences, so it is a very balanced position,” Jenny Harris, chief executive of UKHSA, told...
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