Dr. Shelly: Ok… so we have the filtered material. There should no longer be any bacteria contaminating the sample. Now let's see if we can infect the mice or plants we've set out as test subjects. If so, we'll be able to tell if this microorganism is indeed a virus.

Dr. Begely: No... I don't think that would be the wisest thing to do. That fluid may contain bacterial spores. Such spores can be killed by heat even though they can escape through the filters, and evade destruction by the chemicals. Maybe we should heat the material to 90 degrees Celsius first.

Well, we can either attempt to heat the substance, or just try to infect the subjects first. Which do you think is the wiser approach?

 I say, just follow what Doc Shelly said. It's probably not a bacterial spore. We can test for bacterial spores later. We should first try to see if the liquid infects before we heat it. let's attempt to infect the mice and plants.

 We should listen to Doc Begely, he's right about the bacterial spores still being able to infect after the other tests. We should heat the material first.