1. Infector Anty's hallway, sans Anty

2. “Bidirectional contact tracing isn’t just about finding the infector.

3. Infector Anty at his furthest point in his corridor

4. Infector Anty with yellow eyes due to the blast door being open too long.

5. Bidirectional contact tracing adds a step of “reverse tracing” to find the person that infected the known case—called the “infector”—and then all of the individuals that original person might have infected