They have followed these men for four to nine months and none has developed antibodies.

Usually this is because the person was too recently infected to have developed antibodies, which can take weeks or months.

"We did not know how many people infected would develop antibodies."

He was infected at the time of the rape but still has not developed antibodies.

After the first infection, many people develop antibodies and never have another cold sore.

But the test indicated that the other 14 men were infected more than a year before they developed antibodies.

After about ten years, most people will have developed antibodies to fight these small changes.

And they developed powerful protective antibodies in their blood during the wars.

Your body may develop antibodies to this medication, making it less effective.

I was not able to continue injections at home, since my body had developed antibodies.