More from the WHO from yesterday(yes, I know, our clever Eton-educated British government advisers know much more than those silly foreign world-leading scientists and doctors who actually have extensive real world experience in fighting epidemics but still, perhaps worth a read?):
First, prepare and be ready [...]
Second, detect, prevent and treat.
You can’t fight a virus if you don’t know where it is. That means robust surveillance to find, isolate, test and treat every case, to break the chains of transmission.
Third, reduce and suppress.
To save lives we must reduce transmission. That means finding and isolating as many cases as possible, and quarantining their closest contacts. Even if you cannot stop transmission, you can slow it down and protect health facilities, old age homes and other vital areas – but only if you test all suspected cases.