31.   Glaxo officials said the drug is the first of a new class, called neuraminidase inhibitors, that attacks both type A and type B flu strains.

32.   His was the first case in the world to be identified as the avian flu strain.

33.   Many such flu strains originate in birds, then spread to swine, which are capable of hosting both the bird flu and human flu.

34.   Moscow has been hit by at least two powerful flu strains in recent weeks and older people are particularly susceptible, local doctors said.

35.   Scientists exhume frozen corpses searching for flu strain.

36.   The nasal spray variety did much better, even though it contained the same three flu strains.

37.   The new flu strain came from chickens, and it appears that humans can contract the virus and transmit it to one another.

38.   This is the first time that disease specialists have been present at the earliest stage of a virulent new flu strain, said Shortridge.

39.   Tse Man-si was the third person to contract the deadly flu strain and the third to die of it.

40.   When the two viruses genetically mix in the pig, the result can be a totally new flu strain.