Flying a plane on a secret mission? Some basic geometry can help you avoid being captured by an adversary.
Bridging the gap between the microscopic snd the macroscopic.
What can we expect from a disease for which natural or vaccine induced immunity wanes?
How long do you have to wait for more than one thing to happen?
How long do you have to wait for something to happen?
How long does it take for one person to infect another?