Question

question 3
what does the term \contagious\ mean?
○ disease spreads from animals to humans
○ disease can spread from human to human
○ disease is noninfectious

question 4
is the common cold infectious or noninfectious?
○ infectious
○ noninfectious

Explanation:

Question 3

The term "contagious" refers to a disease that can be transmitted directly from one human to another (e.g., through contact, respiratory droplets). The first option describes zoonotic diseases (spreading from animals to humans), and the third option is incorrect as contagious diseases are infectious.

The common cold is caused by viruses (like rhinoviruses) and can spread from person to person through droplets, contact, etc., so it is infectious. Noninfectious diseases are not caused by pathogens and don't spread, which doesn't apply to the common cold.

Answer:

B. disease can spread from human to human (assuming the options are labeled A, B, C with A: disease spreads from animals to humans, B: disease can spread from human to human, C: disease is noninfectious)

Question 4