74,274 views
4 votes
4 votes
all infectious diseases: a) are contagious b) only occur in humans c) are caused by microorganisms or their products d) are caused by vectors e) involve viruses as the pathogen

User Rowman
by
2.5k points

1 Answer

13 votes
13 votes

Answer:answer is A

Step-by-step explanation:

User DroidFlutter
by
2.8k points