Each year,scientists work to develop a unique influenza vaccine to protect people against the strain expected in the coming flu season.

VOA: standard.2010.07.21

He explains that each medal is unique none of the 615 Olympic and 339 Paralympic medals is identical.

VOA: standard.2010.02.16

Because of their unique surface, each medal is struck with 12 dies nine times with 1,900 tons of pressure, the weight of more than The native designs were laser-engraved on each medal.

VOA: standard.2010.02.16