Samoa has become vulnerable to measles outbreaks as the number of people becoming immunized has declined with the World Health Organisation (WHO) saying vaccine coverage is just about 31%.
Measles has killed more than 5,000 people in the Democratic Republic of Congo since January -- more than double the toll in the country's Ebola epidemic
Official government figures showed there had been one additional fatality since Tuesday, although the number of new measles cases climbed by 249 to 2,686 over the same period.
At least six fatalities, including five children, have been linked to the outbreak of the virus, which has also hit other island states such as Tonga and Fiji
California health officials said a teenage girl from New Zealand sick with measles had visited Disneyland and other popular tourist stops across Southern California earlier this month
The United States recorded 21 new measles cases last week, raising the total number of cases for the year to 1,203 across 30 states in the worst outbreak of the virus since 1992
The Caribbean nation of St. Lucia has imposed a quarantine on a visiting cruise ship, barring any passengers or crew from leaving the boat while in port
The United States so far this year has recorded 695 cases of measles in 22 states, its largest outbreak since public health officials in 2000 declared the disease eradicated