China's Hubei to add virus cases back to tally after methodology change

China's Hubei province, the epicentre of the coronavirus outbreak, said on Friday it will add back some cases to its tally of the disease, after subtracting 279 cases as part of a revision to its methodology. China adjusted its methodology on Wednesday to count only cases that are detected with genetic tests, rather than with CT scans. Officials concluded on Friday that it was a mistake to have removed cases that were already counted.
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