After World War 1 influenza disease occurred in ______?

After World War 1 influenza disease occurred in ______?

پہلی جنگ عظیم کے بعد انفلوئنزا کی بیماری ______ میں واقع ہوئی؟
Explanation

The influenza epidemic that swept the world in 1918 killed an estimated 50 million people.

One-fifth of the world's population was attacked by this deadly virus.

World War I claimed an estimated 16 million lives.

World War I was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.

Chlorine was First used during World War I at Ypres in April 1915
During the First World War, Russia signed the Peace Treaty (1917) with Germany.