<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.shirika la afya duniani linakadiria kwamba katika kila watoto 1000 wanaozaliwa, watoto wawili au watatu huzaliwa wakiwa na tatizo kubwa la usikivu.  <response>: according to the who, out of every 1,000 or 1,100 babies worldwide are born with down syndrome. 