For The Spinoff, Toby Morris illustrates how individuals can break a chain of events:
The good news is, we can do things that will reduce the chances of us spreading the virus. That means we can break these chains and potentially stop hundreds or even thousands of people getting Covid-19. Check out The Spinoff cartoonist Toby Morris’ excellent illustration to understand how individual discipline can have an outsize impact.
Of course infection between people in a community is more complex. Just because one chain is broken doesn’t mean people further down won’t be infected by others in some other way. The goal though is to break as many chains as possible.