Mon, 23 Nov 2009 18:54:09 -0400 http://www.voanews.com/ Up to the minute news from Voice of America Mon, 23 Nov 2009 18:54:09 +0200 Mon, 23 Nov 2009 18:54:09 -0400 Mon, 23 Nov 2009 18:54:09 +0200 http://www.voanews.com/portuguese/2009-11-23-voa3.cfm?rss=americas a RTS-S tem demonstrado ser eficaz na prevenção da doença "www.voanews.com/portuguese/2009-11-23-voa3.cfm?RSS=Americas"