December 23, 2013 --
Merck is recalling some vials of its HPV vaccines after learning glass may have ended up in the containers. The CDC says the glass got into one lot of Gardasil vials during the manufacturing process.
The lot in question was sent out between August and October.
The CDC says patients may have mild symptoms, such as swelling at the injection site, but the vaccine itself isn't impacted.
Merck is contacting the clinics that received the recalled lot so those vaccines can be returned.