Topline Bill & Melinda Gates Foundation CEO Mark Suzman hauv nws tsab ntawv txhua xyoo tau thawb rov qab tawm tsam kev thuam txog lub koom haum lub zog thiab kev cuam tshuam rau cov phiaj xwm kev noj qab haus huv tseem ceeb ntawm pej xeem nyob ib puag ncig ...