ANSWER:
The link of transmission represented in the scenario is infectious agent. Christopher came down with chicken pox after coming from day care because he caught the infection for chicken pox.
Step-by-step explanation:
- Chicken pox is a "highly contagious and infectious diseases" caused by a virus.
- The first symptom is the appearance of a blister like rash that may appear on the face or the trunk and then spreads to the entire body. The recovery time varies between 1 and 2 weeks.