WHO on Yemen conflict: 'Cumulative casualties rose from 350 (verified, 23 Aug) to 1,078 as of 5 September: 884 injuries and 194 deaths. The reporting period accounts for 728 new casualties (601 injured, 127 dead), a 208% increase in 13 days. The case-fatality ratio remains high at 18%, consistent with blast and shelling injuries reaching hospitals late'