That comment from UNICEF Pacific representative, Sheldon Yett, comes as Samoa's government reports that measles has now claimed the lives of 72 people- since the outbreak began in October.
The government today said 4995 measles cases had been reported since the outbreak, with 75 cases recorded in the past 24 hours.
UNICEF is the world's largest procurer of vaccines for preventable diseases, including the Measles Mumps and Rubella or MMR.
Mr Yett said Samoa's national emergency immunisation campaign had been very successful with 93 percent coverage now established.
But online social media negativity from those against vaccination was unhelpful and dangerous, Mr Yett said.
"It's extremely counter productive. It kills children. I mean, we need to make sure that people have the right facts, and that people understand that there are no magic bullets and silver bullets in the world.
"But vaccines are the closest thing to them. They are the best way to ensure that children grow up to be healthy and fully contributing to their countries."
Mr Yet said he was concerned for the entire Pacific region as measles was just a plane flight away and all Pacific countries must take the necessary steps to address any outbreaks.