Losing the sense of smell and taste has become a hallmark of coronavirus infection. But a new study finds that the problem persists in some 5% of patients, disrupting their everyday lives and providing yet another set of symptoms to chalk up to long Covid.
The scientists drew their conclusion after reviewing 18 studies involving more than 3,600 patients. The findings mean that as many as 15 million patients may be affected worldwide, they said in a paper published Thursday in the UK medical journal BMJ.
