A recent study shows that second hand smoke increases the risk of abnormal pap smears. While second hand smoke was not proven to cause cervical cancer, it does prove to cause abnormalities in cervical tissue. In the study, the women who said they were exposed to some second hand smoke were 70 more likely to have an abnormal result.
Actively smoking has already been linked to increasing damage in the cervix caused by HPV. A concrete link between second hand smoke exposure and the cancer may not be a long way off. This study does not confirm a direct connection, but why take a chance?