The team then focused on data from just over 2,600 twins to try to establish whether the symptoms experienced by those predicted to have Covid-19 was related to genetic makeup.
“The idea was to basically look at the similarities in symptoms or non-symptoms between the identical twins, who share 100% of their genes, and the non-identical twins, who only share half of their genes,” Prof Tim Spector, one of the scientists leading the endeavour, told the Guardian. “If there is a genetic factor in expressing the symptoms then we’d see a greater similarity in the identical [twins] than the non-identical [twins] and that is basically what we showed.”
The study, which has not yet been peer reviewed, took into account whether the twins were in the same household, with the results revealing that genetic factors explained about 50% of the differences between people’s symptoms of Covid-19.
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