1683-9803 1683-9803 S1683-98032018000100005 10.31698/ped.45012018001 Paraguay 00 04 2018 00 04 2018 45 1 5 7 1 OMS 2015 2 MSP y BS 2000 3 MSPyBS 2016 4 2018 45 1 1 2007 34 2 2 109-10 6 2007 34 2 2 111-21 7 2016 14 1 1 57-63 8 CDC OPS OMS 2009 9 2015