WARSAW: Poland Polish Prime Minister Donald Tusk said Friday that his government won't buy vaccines for swine flu that have not been properly tested or from producers who won't take responsibility for possible side effects. Tusk told reporters that vaccine producers were pressuring governments to buy, but were also demanding that all responsibility and compensation for possible negative side effects fall upon government shoulders. "Today we are dealing with great pressure from pharmaceutical firms ... we are dealing with expectations that hundreds of millions of zlotys (dollars) will be spent on vaccine while no one wants to guarantee that it has no side effects," he said.