There has been an increase in coronavirus cases in a number of U.S. states, with more among young people, the World Health Organization's Mike Ryan said on Monday.
"What is clear is that the increase is not entirely explained through increased testing. There is some evidence of increasing hospitalisation," he told an online briefing.
(Reporting by Stephanie Nebehay, Emma Farge and John Revill, Writing by Nick Macfie; Editing by Hugh Lawson)
