A needle hypodermic system and method for reducing the incidence of infections due to administering fluids by injection and/or for reducing the risk of surface contamination of sample fluids in humans or animals is provided. The hypodermic needle system may include a first, outer needle with a bore having an open distal end, and a second, inner needle or cannula having a closed distal end and an opening proximal to the distal end which can be rotated or otherwise advanced between open and closed positions. Additionally, the second, inner needle may have a rounded or blunted end and filler material may be used to prevent bacteria or other microbes from being carried by the needles.
