TB, the weaker the response to tests for atopy.

ECONOMIST: Plagued by cures

South Korea suspended its humanitarian aid in response to missile tests by North Korea last July.

ECONOMIST: North Korea's nuclear programme

We use more than twice the number of MRI (magnetic response imaging) tests as the OECD median.

FORBES: Who Causes Half of Healthcare Costs?

Among the companies looking into whether brain signals can supplement or replace traditional tests of consumer response to commercials are General Motors, Ford of Europe, and Camelot, the U.K.'s national lottery operator.

FORBES: In Search of the Buy Button

The beer maker has rejected the lawsuit's allegations and now points to media outlets' independent tests to bolster its response.

CNN: STORY HIGHLIGHTS

Security Council has issued three separate resolutions on North Korea, in response to its nuclear and missile tests since 2006.

NPR: Kerry: Response To NKorea Will Send Iran A Message

Given the magnitude of the disaster, and the likely increase in the death toll, China certainly faces further tests on the efficacy of its response.

ECONOMIST: China

The US, Japan and South Korea are seeking a response in the UN Security Council, which banned North Korea from missile tests after nuclear tests in 2006 and 2009.

BBC: North Korea rocket 'was domestically made'

The vaccine looks powerful in human tests, stimulating up to 150 times the body's normal immune response to HPV.

FORBES: Cornering A Killer

In the tests, 0.15 units per kilogram of body weight produced the same response as 0.5 units of normal insulin.

BBC: Insulin smoke signals breakthrough

And the tests used to diagnosis hepatitis and HIV are based on the body's immune system response to infection, so some results could have come back negative prematurely.

CNN: Dozens of Okla. dentist's patients positive for hepatitis