hi im in middle school and i hav to do some stupid project on pneumonia... can u answer a few questions, and confirm a couple facts, pls?
1. wuts a "vector"? is there a difference between it and a pathogen?
2. has there been any major epidemics?
3. it was discovered b4 Hippocrates, right?
4. age is 2 or under, 65+, and/or ppl with pre-existing medical issues