Every infection is a chain of six links. A microbe has to complete all six to reach a new host. That is the good news. Cut any single link and spread stops. Pick an outbreak, read each link, cut one, then run the transmission and see where it halts.
The chaintap a link to read it
Tap a link in the ring, or pick one from the list.
Run the transmissionwatch it try all six
The chain has not been tested yet. Press Run and the microbe will try each link in turn.
Links intact
6 of 6
Links cut
0
Reached host
not run
The chain of infectionpick an outbreak, then a link