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Covid-19 Skin rash is present in 17% of positive covid cases Researchers from King’s College, London compiled a catalogue of images of the most common skin manifestations of covid‐19 (https://covidskinsigns com) after finding an association between skin rashes and a positive swab test result (odds ratio 1 67 (95% confidence interval 1 41 to 1 96)), from data on 336 847 UK users of the Covid Symptom Study app (Full story doi:10 1136/bmj n108) Trials of convalescent plasma are needed An observational study published in the New England Journal of Medicine found that convalescent plasma seemed to be most beneficial in patients who received transfusions containing high levels of antibodies early in the course of covid infection (Full story doi:10 1136/bmj n143) Research news Fried food links to major heart and stroke risk An analysis from studies involving more than 1 3 million participants found that the highest category of weekly fried food consumption, when compared with the lowest, was associated with a 28% raised risk of major cardiovascular events, a 22% raised risk of coronary heart disease, and a 37% raised risk of heart failure
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