Distribution of confirmed measles cases by sub national level Distribution of confirmed measles cases by sub national level. The Americas, 2017-2018* 2018 ATG=1 ARG=3 BRA=105 CAN=6 COL=19 ECU=1 GTM=1 MEX=4 PER=2 USA=63 VEN= 904 Total= 1109 2017 CAN=45 USA=120 ARG=3 VEN=727 Total=895 1 dot=1 confirmed case Source: SysVPD (ISIS), country reports, Pan American Health Organization / World Health Organization. Epidemiological Update: Measles. 7 May 2018, Washington, D.C.: PAHO/WHO; 2018. *Data as of epidemiological week 17-2018