<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?shirika la afya duniani who linasema watu takribani bilioni 3.3 ambayo ni karibu nusu ya watu wote duniani wako katika hatari ya kuugua malaria.  <response>: according to the world health organization who, approximately 3.3 billion people, nearly half of the world population, are at risk of malaria. 