Errors and disasters do not come about by one causal factor. There is always a chain of unpredictable events. This also poses a problem for scientists. They do not know the law of conservation of misery.
The Corona virus spreads via coughing and sneezing. The way it spreads should be easy to investigate. But that does not turn out to be true. Scientists only know a fraction of what they want to know and have to deliver facts to the authorities in order for them to act swiftly. Our Dutch scientists are top of the bill. Therefore, I have confidence in them.