Coronavirus is once again spreading rapidly. In recent weeks, there has been a dramatic increase in the number of infections, with figures up to around 9,000 per day. The number of patients with COVID-19 in hospitals and care homes is also rising. That has an impact on healthcare in general; more than one million routine hospital procedures have had to be postponed. Unfortunately, it is not always possible to trace the source of an infection. But one thing is clear: the more people a person comes into contact with, the greater their chance of being infected. In order to ensure normal healthcare services can continue, we must take action and limit our contact with other people as much as possible. This is why the Netherlands will go into its strictest lockdown yet from 15 December until at least Tuesday 19 January.