Besides winning Indonesia a seat on the United Nations' new human-rights body, Mr Yudhoyono's main foreign-policy achievement so far has been improved relations with the United States.

ECONOMIST: Indonesia

They found a 13% lower risk of rejection - where the body recognises the new heart as "foreign" and attacks it - in matched transplants over the first year.

BBC: Surgery

Knox was 20 and Kercher was 21 years old, studying at Perugia's university for foreign students, when Kercher's semi-naked body was found in the house they shared.

CNN: Italian jury clears American Amanda Knox of murder

Ultimately, that kind of decision-making gets rejected, as if it were a foreign body.

NEWYORKER: Streaming Dreams

Type I diabetes is thought to be an "autoimmune" disease in which the body's own immune system - which is meant to fight foreign threats like bacteria - turns on the cells in a gland called the pancreas.

BBC: 'Thriving' babies in diabetes risk

In the absence of foreign antigens, a juiced-up immune system sometimes can't stop attacking its own body.

FORBES: Those Resourceful Bugs

The foreign secretary formally approved Mr Kinnock's appointment as head of the state-funded cultural body - after he had been recommended by an independent panel.

BBC: NEWS | UK | Politics | Kinnock to head British Council

In a cruel twist, the body's disease-fighting T cells attack healthy skin cells, misidentifying them as foreign.

FORBES: Skin Deep