Pay special attention to Italy (COVID-19)
Italy has a modern, westernized medical system similar in quality to the United States. The country is quite a bit smaller and less populated than the US, but it's easy to look there and imagine it could be an example of what may befall us here if we are unable to stave off a massive outbreak of the virus. In my opinion, due to the lack of control over our border and ports of entry, we will be unable to stop the spread.
