HOW DO INFECTIOUS DISEASES SPREAD ?

12345
Across
  1. 2. The ability to resist infection or disease.
  2. 3. The process by which a pathogen is spread from one host to another.
  3. 5. An organism that transmits a pathogen from one host to another.
Down
  1. 1. A microorganism that can cause disease.
  2. 4. An organism that harbors a pathogen.