zoonoses

In Melbourne last Saturday nine public housing towers with 3,000 residents were shut down for at least five days, due to a large cluster of identified cases of COVID-19 within their walls. Since then, of course, the whole of Melbourne has been locked down for about six weeks. And this is a Melbourne burgeoning with high-rises.

Chart of alert levels from World Health Organisation (WHO) http://www.who.int/csr/disease/avian_influenza/phase/en/index.html This page also contains details of what the chart symbolises and is useful to understanding the situation.