1.   Leprosy was known to have a long incubation period-a fact considerably at odds with popular misconceptions about instant deformity.

2.   The incubation period almost certainly varies with the number of bacteria originally passed on.

3.   The long incubation period means that no Third World country has yet faced the full truth of what is to come.

4.   Hepatitis has a long incubation period.

5.   The initial detectable marker found in blood during the incubation period of a hepatitis B infection is hepatitis B surface antigen.

6.   Production remains linear over this time suggesting good viability, and all experiments were completed within a two hour incubation period.

7.   The recognised incubation period is fifteen hours or more.

8.   Anyone who does contract the illness may not even know it until returning home, since the incubation period is seven to nine days.

9.   Apparently it takes far fewer spores to infect the animals, and the incubation period is only a fraction of that for humans.

10.   As with AIDS, the incubation period is very long.