When cervical cells first become abnormal, there are rarely any warning signs.

Types 6 and 11, although not linked to cancers, are often found in abnormal looking cervical cells, he said.

So far, studies show the vaccine prevents 99% of the changes in cervical cells that are classified as early cancer.

Should women who already have cervical cell changes get the vaccines?

A Pap test can find changes in cervical cells before they turn into cancer.

But changes in cervical cells usually progress slowly and take many years to become cancer cells.

Abnormal cervical cells, which can be removed by various techniques.

Changes in cervical cells are classified by their degree of abnormality.

This test may be done if the results of a Pap smear show certain abnormal cervical cells.

If the body clears the infection, the cervical cells return to normal.