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The kids caught measles in Vietnam. They were the importing vector.

• mattnewport 8y ago
  But an outbreak implies other children caught measles (the article suggests other children at their school) so they also weren't vaccinated presumably.
  • aiyodev 8y ago
    No. The vaccine is only 97% effective. If you’re vaccinated you can still contract the disease.
    • masonic 8y ago
      97% under ideal conditions (including 2 doses of quality vaccine). Per the article, the Vietnam health system usually only provides 1.
    • mattnewport 8y ago
      That would still prevent an "outbreak" if all the other kids were vaccinated.
      • buchanan 8y ago
        Measles has a "90% secondary infection rate in susceptible domestic contacts". So, its likely that his brothers were infected as well. That leaves five others. With the mentioned "97% vaccination success rate under ideal conditions", the fact that they were mixing around in school (and those they infected as well), it does not seem a stretch.