"At this point, I'd call it an even toss between infection and tumor," the pathologist said.

The second problem is the time lag between infection and development of detectable antibodies in the blood.

In an infectious disease, the incubation period is the time between infection and the appearance of symptoms.

The time between infection and onset of cancer also varies geographically.

It's also critical to stress the long lag time between infection and illness.

The common incubation period (the time between infection and onset of symptoms) is from three to seven days.

There is not a straightforward relationship between infection and disease.

The time between infection and the appearance of the symptoms, (the incubation period), is roughly one week.

The focus of his research has been the relationship between persistent viral infection and the development of disease.

The first published report to establish a link between infection with a virus and the regression of cancer appeared in 1912.