Below is an extract from the BBC world report on anti-Coronavirus measures.

The US declined to use a test approved by the World Health Organization in January - instead, the CDC developed its own coronavirus test. However, there were manufacturing defects with the initial CDC tests which meant many of the results were inconclusive.

Lawmakers who attended Thursday's health briefing said that there were also problems with the supply chain for testing kits, with stocks of cotton swabs and gloves running low.

And earlier this week, the director of the CDC told a congressional hearing: "There's not enough equipment, there's not enough people, there's not enough internal capacity."

"The truth is... we've underinvested in the public health labs."

This is the "Tremendous" testing programme that Trump was touting yesterday.