Task:1. Does the outbreak have the seasonality? Which months have highest frequency?

Answer: Yes, it does. The outbreak has high frequency in winter and reaches the bottom in summer.

Description of experience:

This time-series line plot shows the number of Illnessses, Hospitalizations and Deaths. At first I cleaned the data by concatenating "Year" and "Month" as timestamp. Second, I set layers in VegaLite API to draw multiple lines. And then modified them to make it better.

Interaction:

When mouse moves to the line, it will show the corresponding value at the point.

Data Source