) to the specific dating questions on the Bottle Dating page are included so that a user can reference the necessary portions of that page.
A: Most would agree that you should limit use of multidose vials whenever possible.There are varying recommendations on when the used multidose vials should be discarded which is why our position paper noted it as an unresolved issue.Mouth-blown (aka "hand-made") bottles were produced by skilled craftsmen who gathered the hot glass onto a blowpipe manually then formed the bottle with air pressure applied by mouth to the blowpipe, with (usually) or without the aid of a mold.The 1908 image to the right was taken at the Seneca Glass Works in Morgantown, WV.The term multidose seems to be confusing because it is seen by some HCP as being able to be used more than once.
While this is true, there are basic infection control practices that are not followed and/or corners that are cut that put the vial at risk for viral or bacterial contamination.
The beyond-use-date should never exceed the manufacturer’s original expiration date.
For information on storage and handling of vaccines please refer to the CDC Vaccine Storage and Handling Toolkit or the manufacturer’s recommendations for specific vaccines.
In front of the gaffer in this image (to his right) is the chair where much work was done with blowpipe manipulation prior to lowering the parison into the mold.
A second boy looks on with (possible) admiration of the gaffer as they were the highest paid and most elite workers on the glass factory floor and among the highest paid of all skilled laborers during the 19th century (Barnett 1926).
and shows a gaffer (with the blowpipe) at work with his "mold tender" boy (seated).