There's a saying in business and science - "If's it's not documented, it didn't happen." Similarly in disease outbreaks. If you don't test, and keep testing, y

There's a saying in business and science - "If's it's not documented, it didn't happen." Similarly in disease outbreaks. If you don't test, and keep testing, you have no idea whatsoever how widespread the disease really is, and how well your prevention and treatments are doing.