More COVID-19 waves are on the cards, according to physics

As a physicist, I am trained to look for patterns in data. For example, the motion of the tiniest particles may seem random, but it contains patterns and symmetries.

The same can be said of human movements and interactions. Most humans move to and between familiar places (home and work, for instance) and may encounter the same individuals, like colleagues, most days.

But naturally, there are also random interactions in our complex modern world. There’s a good chance that we will bump into random strangers as we go from

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