Across
- 2. an infectious agent that can only replicate within a host organism.
- 6. an action of passing on something to another person
- 7. conditions or practices conducive to maintaining health and preventing disease, especially through cleanliness.
- 8. resistant to a particular infection or toxin owing to the presence of specific antibodies or sensitized white blood cells.
- 9. the state of being free from illness or injury.
Down
- 1. transported by air.
- 3. The invasion and growth of germs in the body
- 4. a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
- 5. A means of Spread of an infection