New foreign medical teams will relieve exhausted doctors, nurses

New Zealand, the UK and Israel are sending dozens more nurses and doctors to Samoa to assist with the epidemic.

There have been nearly 4700 cases of measles diagnosed since October.

The UK government said in a statement 14 medics will arrive on Sunday, to relieve a team that arrived two weeks ago.

"The medical system here is under the most enormous amount of strain, with the hospital operating far, far beyond its usual capacity," said Becky Platt, a paediatric nurse with the UK Emergency Medical Team.

"The local staff have been working around the clock for weeks and weeks on end, many of them without proper breaks or any days off. Some of them are absolutely on their knees."

Israel's Foreign Ministry said a team of around 10 Israeli doctors and nurses from the Sheba Medical Centre arrived on Monday and will be deployed for about two weeks to Tupua Tamaese Meaole Hospital.

"Our goal is to help the people of Samoa and represent the state of Israel," said Yitshak Kreiss, director general of the centre, which is the largest hospital in Israel.

Porirua provider Pacific Health Plus said it sent one medical volunteer to Samoa on Monday and another will arrive later this week, in a joint project with the Pacific Cooperation Foundation.

Earlier, Prime Minister Tuilaepa Sailele Malielegaoi said more than 20,000 vaccines were administered over the space of the two-day lockdown designed to stem the tide of the deadly measles epidemic, with vaccination teams visiting households to administer shots.

The measles vaccine can take about two weeks to provide immunity to the disease.

Meanwhile, the World Bank has given Samoa a $US3.5 million grant to support the response to the measles outbreak.

The World Bank said it was deeply saddened by the loss of life in Samoa.

It said the grant was available under an agreement that gives the government access to emergency funding in the event of a national emergency.

In addition, the bank has approved a $US9.3m grant to improve Samoa's health system over the next five years.

The bank said the Samoa Health System Strengthening Program aimed to improve the country's ability to prevent outbreaks of communicable diseases such as measles, and stem the rise of non-communicable diseases like diabetes.

The programme would help to ensure Samoan families, particularly those in rural areas, had access to trained physicians and quality health services.