Imperial College London announced: Sub-variant AY.4.2 Delta strain is contagious but has few symptoms

Imperial College London announced: Sub-variant AY.4.2 Delta strain is contagious but has few symptoms - Photo 1.

Diners sit at outdoor tables of a restaurant in London – England – Photo: AP

The REACT-1 study by Imperial College London (UK) found that the number of cases of the AY.4.2 variant now accounts for nearly 12% of the samples that have been sequenced in the UK, but only a third of these have the Common symptoms of COVID-19

According to epidemiologists, AY.4.2 is thought to be about 10-15% more infectious than the original Delta strain because it contains mutations A222V and Y145H that are able to enter cells. However, there is no evidence that the AY.4.2 variant causes more severe disease or is more resistant to vaccines than the original Delta strain.

The team says that people with AY.4.2 who are asymptomatic may be able to self-isolate for shorter days, while those with few symptoms may also be less likely to spread the virus through coughing and may also not get sick. heavy.

“The AY.4.2 variant seems to be more transmissible, but it also causes less symptoms. This is a good thing,” said Paul Elliott, an epidemiologist at Imperial College London.

By page outbreak.info, as of November 16, variant AY.4.2 has appeared in at least 39 countries around the world and currently has a total of about 40,200 cases of AY.4.2 infection globally.

Previously, Imperial College London published initial research results showing that the number of new COVID-19 cases in the UK was highest in October, especially in children.

The full results of the latest round of studies, conducted between October 19 and November 5, confirmed a recent drop in the number of daily new cases from the October peak, which coincided with the holiday. midterms in British schools.

In addition, the REACT-1 study also found that a booster dose of COVID-19 vaccine reduced the risk of infection by two-thirds in adults compared with those who had received two full doses.

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