But a rare, novel strain of the flu virus would be able to spread quickly to almost any individual.

A rare strain of lung cancer was discovered in his lungs in September 1994.

Klebsiella is a common bacteria, but the rare strain found at Guy's is resistant to most antibiotics.

Presently such a program is far from becoming a reality and rare strains are vanishing faster than they can be saved.

This does not mean that rare strains are not valuable, but careful selection is even more important to successful breeding.

A rare strain of drug-resistant tuberculosis also killed at least 13 inmates in the state prison system last year.

In particular, they wondered about a rare strain known as A(H5N1).

He had been suffering from the disease since the age of 18, but was unaware of its rare strain in his family.

He died in 2001 from a rare strain of pneumonia.

They are not very efficient yet highly cost effective for harvesting premium and rare strains of tobacco.