The World Health Organisation says many people in the Pacific region are placed at high risk from swine flu complications.
This comes as recent US data show that apart from underlying health problems, obesity may increase the risk of swine flu complications and death.
Tonga has confirmed its first two, and the Marshall Islands its first four confirmed cases of the H1N1 virus.
In Fiji, the number of people infected has climbed to more than 70, and New Caledonia has now about 40 confirmed cases.
A World Health Organisation medical officer, Dr. Jacob Kool, says Pacific people are amomg the most vulnerable.
"People in the Pacific have a lot of risk factors, obesity and heart disease, but also diabetes and heart disease, they have some of the highest rates in the world here. There's also a lot of asthma. In addition, we've seen with other pandemics that influenza often leads to a lot of severe illnesses in the Pacific."
Samoa, American Samoa, Vanuatu, Palau, Guam, the Cook Islands, Papua New Guinea and French Polynesia also have cases.
