A roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines includes a higher complication rate with Covid-19 versus the flu.

So-called arthroscopic knee surgery is becoming a less common treatment for adults with torn cartilage or painful arthritis as a growing body of evidence shows little benefit from these operations, a U.S. study suggests.

People who have trouble falling asleep and staying asleep may want to seek advice from a doctor and avoid long-term use of sleeping pills, medical experts advise.