[givemELL]

There are only 19 level 4 bio hazard units in the US and 4 in the UK:

http://www.thedailysheeple.com/there-are-only-19-level-4-bio-containment-beds-in-the-whole-of-the-united-states-and-four-in-the-uk_102014

[Enlightened1]

Great 19 for over 300 million people.