For the record

The Observer - - Comment & Analysis -

The drug sold as Keytruda, used in can­cer treat­ment, was ap­proved in 2015, not last year as we said (Can­cer: how to kill a killer, the New Re­view, 4 November, page 27).

The First World War is thought to have cost 15-20 mil­lion lives. The 37 mil­lion fig­ure we used in­cluded the wounded (“May hails UK’s ‘close­ness’ with Europe ahead of ar­mistice events”, 4 November, News, page 2).

Write to the Read­ers’ Edi­tor, the Ob­server, York Way, Lon­don N1 9GU, email ob­server. read­ers@ ob­, tel 020 3353 4736

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