In this episode each of the dinosaurs have a certain disease after they have caught Harry's cold. Here's a list that shows what diseases Harry's dinosaurs have:
1) Taury: itchyspotitis;
2) Sid: heliumnes balloonis;
3) Pterence: thermamopersiosis;
4) Trike: a hornache;
5) Patsy: her neck elongates.
Steggy doesn't have a disease but he sneezes in the end, proclaiming that he is finally sick.