Syringe with retractable needle

A syringe comprising:

• a body, said body including a longitudinally extending hollow portion defining an interior chamber open at a first end, said body including a surface formed at a second end of the chamber, said surface having a needle opening formed therethrough, said surface closing the second end except for said needle opening, said body further including at least two deflectable latch fingers extending into said chamber from said surface, said body formed of a mouldable material and moulded in one piece with said hollow portion, said surface and said latch fingers integrally formed as a unitary structure;
• a plunger slidably disposed within said chamber through the open first end;
• a needle holder disposed with the interior chamber adjacent said surface, said needle holder holding a hollow needle fixed thereto, said needle extending through the needle opening;
• a spring disposed between at least a portion of said needle holder and said surface, said spring compressed by said needle holder such that said spring provides a force which acts so as to urge said needle holder towards said first end of said chamber, wherein,
• said latch fingers include a portion which act to hold said needle holder and said needle in position against the urging of said spring, and wherein, when said plunger is slid forwardly in said chamber and into contact with said fingers, said fingers are flexed radially outwardly so as to allow said needle holder and said needle to be retracted within said chamber by the urging of said spring.