The number of coronavirus deaths in the United States rose from 1 to 100 in a little more than two weeks. About a week later, the number skyrocketed to 1,000. Those numbers are tragic. For many people ...

A variable undergoing logistic growth initially grows exponentially. After some time, the rate of growth decreases and the function levels off, forming a sigmoid, or s-shaped curve. For example, an ...

The explosive spread of coronavirus can be turned to our advantage, two infectious disease experts argue: “But only if we intervene early. That means now.” By Siobhan Roberts In early December, Britta ...