Scientists investigated the transmission of the measles virus, a highly infectious viral pathogen. The primary symptom is a characteristic red-brown skin rash alongside a fever.
A cohort of 404040 children attended an indoor trampoline park social event on Day 000. One of the children was unknowingly infectious with measles on the day of the event.
Every two days following the event, researchers monitored the remaining 393939 children and recorded the day on which they first developed the measles rash. The findings are compiled in Table 1.
Table 1
| Day when measles rash first showed | Number of children |
|---|---|
| 6 | 0 |
| 8 | 1 |
| 10 | 4 |
| 12 | 14 |
| 14 | 9 |
| 16 | 2 |
| 18 | 0 |
| 20 | 0 |
| Total | 30 |
What was the range of days on which children first showed the measles rash? Use the data in Table 1.
From day ____________ to day ____________
Incubation time is defined as the period between exposure to a pathogen and the initial appearance of symptoms. Suggest the most likely incubation time for measles based on this cohort.
Incubation time = ____________ days
Suggest one reason why some of the children at the event did not develop measles.