Now it's linked to death.
The European Medicines Agency (EMEA) said one of the young women who received Gardasil died in Germany while the other was in Austria. It has not released their ages.
It follows the deaths of three young women aged 12, 19 and 22 who were reported to have died in the U.S. days after Gardasil was administered, with 1,700 patients suffering "adverse reactions". There were no previous recorded deaths in Europe.
The EMEA said: "In both cases, the cause of death could not be identified.
"No causal relationship has been established between the deaths of the young women and the administration of Gardasil."