By 2050, the number of older persons in the world will exceed the number of young for the first time in the history of mankind, ” said Ivan Šimonovic, president of the Economic and Social Council, addressing the Second World Assembly on Ageing, which was held in Madrid, Spain, in April 2002.
“ यह नुकसान उस समय हो सकता है, जब खून देनेवाले की श्‍वेत रक्‍त कोशिकाएँ एन्टिबॉडीज़, खून लेनेवाले के श्‍वेत रक्‍त कोशिकाओं के साथ मेल नहीं खाती ।